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* hostapd: Apply SAE/EAP-pwd side-channel attack update 2Hauke Mehrtens2022-02-131-1/+1
| | | | | | | | | This fixes some recent security problems in hostapd. See here for details: https://w1.fi/security/2022-1 * CVE-2022-23303 * CVE-2022-23304 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
* hostapd: P2P: Fix a corner case in peer addition based on PD RequestStefan Lippers-Hollmann2021-03-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | p2p_add_device() may remove the oldest entry if there is no room in the peer table for a new peer. This would result in any pointer to that removed entry becoming stale. A corner case with an invalid PD Request frame could result in such a case ending up using (read+write) freed memory. This could only by triggered when the peer table has reached its maximum size and the PD Request frame is received from the P2P Device Address of the oldest remaining entry and the frame has incorrect P2P Device Address in the payload. Fix this by fetching the dev pointer again after having called p2p_add_device() so that the stale pointer cannot be used. This fixes the following security vulnerabilities/bugs: - CVE-2021-27803 - A vulnerability was discovered in how p2p/p2p_pd.c in wpa_supplicant before 2.10 processes P2P (Wi-Fi Direct) provision discovery requests. It could result in denial of service or other impact (potentially execution of arbitrary code), for an attacker within radio range. Fixes: 17bef1e97a50 ("P2P: Add peer entry based on Provision Discovery Request") Signed-off-by: Jouni Malinen <jouni@codeaurora.org> Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de> (cherry picked from commit 1ca5de13a153061feae260864d73d96f7c463785)
* hostapd: backport ignoring 4addr mode enabling errorRaphaël Mélotte2021-02-201-1/+1
| | | | | | | | | | | | | | | | | | | This is a backport of the upstream commit 58bbbb598144 ("nl80211: Ignore 4addr mode enabling error if it was already enabled"). nl80211_set_4addr_mode() could fail when trying to enable 4addr mode on an interface that is in a bridge and has 4addr mode already enabled. This operation would not have been necessary in the first place and this failure results in disconnecting, e.g., when roaming from one backhaul BSS to another BSS with Multi AP. Avoid this issue by ignoring the nl80211 command failure in the case where 4addr mode is being enabled while it has already been enabled. Signed-off-by: Raphaël Mélotte <raphael.melotte@mind.be> [bump PKG_RELEASE, more verbose commit description] Signed-off-by: Petr Štetiar <ynezz@true.cz> (cherry picked from commit fb860b4e418c28a0f388f215e5acce103dcee1bf)
* hostapd: fix P2P group information processing vulnerabilityDaniel Golle2021-02-041-1/+1
| | | | | | | | | | | | | | A vulnerability was discovered in how wpa_supplicant processing P2P (Wi-Fi Direct) group information from active group owners. This issue was discovered by fuzz testing of wpa_supplicant by Google's OSS-Fuzz. https://w1.fi/security/2020-2/wpa_supplicant-p2p-group-info-processing-vulnerability.txt Signed-off-by: Daniel Golle <daniel@makrotopia.org> [added the missing patch] Signed-off-by: Petr Štetiar <ynezz@true.cz> (cherry-picked from commit 7c8c4f1be648aff9f1072ee27a2cc8f6a4a788ef)
* hostapd: add wpad-basic-wolfssl variantPetr Štetiar2020-08-101-0/+13
| | | | | | | | | | Add package which provides size optimized wpad with support for just WPA-PSK, SAE (WPA3-Personal), 802.11r and 802.11w. Signed-off-by: Petr Štetiar <ynezz@true.cz> [adapt to recent changes, add dependency for WPA_WOLFSSL config] Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> (cherry picked from commit c487cf8e94cbdf582dfc3c2bdaab913a146a2100)
* hostapd: reorganize config selection hierarchy for WPA3Adrian Schmutzler2020-08-101-16/+18
| | | | | | | | | | | | | | | | | | | | | The current selection of DRIVER_MAKEOPTS and TARGET_LDFLAGS is exceptionally hard to read. This tries to make things a little easier by inverting the hierarchy of the conditions, so SSL_VARIANT is checked first and LOCAL_VARIANT is checked second. This exploits the fact that some of the previous conditions were unnecessary, e.g. there is no hostapd-mesh*, so we don't need to exclude this combination. It also should make it a little easier to see which options are actually switched by SSL_VARIANT and which by LOCAL_VARIANT. The patch is supposed to be cosmetic. However, the improvement for readers and the maintained consistency with master qualify this for backporting. Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> (cherry picked from commit c4dd7fc23bfcf3b3f1a838668bb070edc9db5d4b)
* hostapd: improve TITLE for packagesAdrian Schmutzler2020-07-301-25/+33
| | | | | | | | | | | | | | | For a few packages, the current TITLE is too long, so it is not displayed at all when running make menuconfig. Despite, there is no indication of OpenSSL vs. wolfSSL in the titles. Thus, this patch adjusts titles to be generally shorter, and adds the SSL variant to it. While at it, make things easier by creating a shared definition for eapol-test like it's done already for all the other flavors. Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> (cherry picked from commit 917980fd8a6589d6911797211f1871016f527f8c)
* hostapd: backport wolfssl bignum fixesDaniel Golle2020-05-251-1/+1
| | | | | | | | | crypto_bignum_rand() use needless time-consuming filtering which resulted in SAE no longer connecting within time limits. Import fixes from hostap upstream to fix that. Signed-off-by: Daniel Golle <daniel@makrotopia.org> (cherry picked from commit 631c437a91c20df678b25dcc34fe23636116a35a)
* hostapd: unconditionally enable ap/mesh for wpa-cliFelix Fietkau2020-05-011-1/+1
| | | | | | | | | | | Without this change, wpa-cli features depend on which wpad build variant was used to build the wpa-cli package Signed-off-by: Felix Fietkau <nbd@nbd.name> Tested-by: Jérôme Benoit <jerome.benoit@piment-noir.org> [WRT1900AC v1] [added missing package version bump] Signed-off-by: Petr Štetiar <ynezz@true.cz> (cherry picked from commit 03e9e4ba9ea8f00ff7c6f076f2cdc322e18cd3a4)
* hostapd: remove erroneous $(space) redefinitionJo-Philipp Wich2020-02-081-3/+0
| | | | | | | | | | | | | | | | | The $(space) definition in the hostapd Makefile ceased to work with GNU Make 4.3 and later, leading to syntax errors in the generated Kconfig files. Drop the superfluous redefinition and reuse the working $(space) declaration from rules.mk to fix this issue. Fixes: GH#2713 Ref: https://github.com/openwrt/openwrt/pull/2713#issuecomment-583722469 Reported-by: Karel Kočí <cynerd@email.cz> Suggested-by: Jonas Gorski <jonas.gorski@gmail.com> Tested-by: Shaleen Jain <shaleen@jain.sh> Signed-off-by: Jo-Philipp Wich <jo@mein.io> (cherry picked from commit 766e778226f5d4c6ec49ce22b101a5dbd4306644)
* hostapd: cleanup IBSS-RSNDaniel Golle2020-01-161-1/+1
| | | | | | | set noscan also for IBSS and remove redundant/obsolete variable. Signed-off-by: Daniel Golle <daniel@makrotopia.org> (cherry picked from commit 702c70264b388c2b47e171843f297f43c71b86b9)
* hostapd: Add mesh support for wpad fullHauke Mehrtens2019-11-141-2/+2
| | | | | | | | | | | | | | | This increases the size of the binary slightly: old: 427722 wpad-wolfssl_2019-08-08-ca8c2bd2-1_mipsel_24kc.ipk 431696 wpad-openssl_2019-08-08-ca8c2bd2-1_mipsel_24kc.ipk new: 442109 wpad-wolfssl_2019-08-08-ca8c2bd2-1_mipsel_24kc.ipk 445997 wpad-openssl_2019-08-08-ca8c2bd2-1_mipsel_24kc.ipk Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> (cherry picked from commit 49cc712b44c76e99bfb716c06700817692975e05)
* hostapd: Update to version 2.9 (2019-08-08)Hauke Mehrtens2019-11-141-3/+3
| | | | | | | | | | | | | | | | | | | The size of the ipkgs increase a bit (between 0.7% and 1.1%): old 2019-04-21 (2.8): 288264 wpad-basic_2019-04-21-63962824-1_mipsel_24kc.ipk 256188 wpad-mini_2019-04-21-63962824-1_mipsel_24kc.ipk 427475 wpad-openssl_2019-04-21-63962824-1_mipsel_24kc.ipk 423071 wpad-wolfssl_2019-04-21-63962824-1_mipsel_24kc.ipk new 2019-08-08 (2.9): 290217 wpad-basic_2019-08-08-ca8c2bd2-1_mipsel_24kc.ipk 258745 wpad-mini_2019-08-08-ca8c2bd2-1_mipsel_24kc.ipk 431732 wpad-openssl_2019-08-08-ca8c2bd2-1_mipsel_24kc.ipk 427641 wpad-wolfssl_2019-08-08-ca8c2bd2-1_mipsel_24kc.ipk Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> (cherry picked from commit 167028b750028ae3dac24f5ff96bbb1ba04e8bd7)
* hostapd: Update to version 2.8 (2019-04-21)Hauke Mehrtens2019-11-141-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This also syncs the configuration files with the default configuration files, but no extra options are activated or deactivated. The mesh patches were partially merged into hostapd 2.8, the remaining patches were extracted from patchwork and are now applied by OpenWrt. The patches still have open questions which are not fixed by the author. They were taken from this page: https://patchwork.ozlabs.org/project/hostap/list/?series=62725&state=* The changes in 007-mesh-apply-channel-attributes-before-running-Mesh.patch where first applied to hostapd, but later reverted in hostapd commit 3e949655ccc5 because they caused memory leaks. The size of the ipkgs increase a bit (between 1.3% and 2.3%): old 2018-12-02 (2.7): 283337 wpad-basic_2018-12-02-c2c6c01b-11_mipsel_24kc.ipk 252857 wpad-mini_2018-12-02-c2c6c01b-11_mipsel_24kc.ipk 417473 wpad-openssl_2018-12-02-c2c6c01b-11_mipsel_24kc.ipk 415105 wpad-wolfssl_2018-12-02-c2c6c01b-11_mipsel_24kc.ipk new 2019-04-21 (2.8): 288264 wpad-basic_2019-04-21-63962824-1_mipsel_24kc.ipk 256188 wpad-mini_2019-04-21-63962824-1_mipsel_24kc.ipk 427475 wpad-openssl_2019-04-21-63962824-1_mipsel_24kc.ipk 423071 wpad-wolfssl_2019-04-21-63962824-1_mipsel_24kc.ipk Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Tested-by: Stefan Lippers-Hollmann <s.l-h@gmx.de> (cherry picked from commit 8af79550e6c280717660f66032d89d21007b15d2)
* hostapd: mirror ieee80211w ap mode defaults in station modeJo-Philipp Wich2019-11-141-1/+1
| | | | | | | | | | | | For AP mode, OpenWrt automatically sets ieee80211w to either 1 or 2, depending on whether the encryption is set to sae-mixed, or sae/owe/eap suite-b. Mirror the same defaults for client mode connections, in order to allow an OpenWrt station to associate to an OpenWrt ap with SAE, OWE or Suite-B encryption without the need to manually specify "option ieee80211w" on the station. Signed-off-by: Jo-Philipp Wich <jo@mein.io> (cherry picked from commit abb4f4075e791789fdb00731035e08a8cf51555f)
* hostapd: fix OWE settings in client modeJo-Philipp Wich2019-11-141-1/+1
| | | | | | | | | This changes fixes the generation of the wpa_supplicant client configuration in WPA3 OWE client mode. Instead of incorrectly emitting key_mgmt=NONE, use the proper key_mgmt=OWE setting instead. Signed-off-by: Jo-Philipp Wich <jo@mein.io> (cherry picked from commit 4209b28d23b8bf28575af5e8904194f49b81532e)
* hostapd: SAE/EAP-pwd side-channel attack updateHauke Mehrtens2019-09-101-1/+1
| | | | | | | | | Fixes this security problem: * SAE/EAP-pwd side-channel attack update https://w1.fi/security/2019-6/sae-eap-pwd-side-channel-attack-update.txt Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> (cherry picked from commit 7bed9bf10fc8d05df34c7efc66e8b4ade37a1a0c)
* hostapd: Fix security problem in EAP-pwdHauke Mehrtens2019-09-101-1/+1
| | | | | | | | | | | | This fixes: CVE-2019-11555 "EAP-pwd message reassembly issue with unexpected fragment" https://w1.fi/security/2019-5/eap-pwd-message-reassembly-issue-with-unexpected-fragment.txt This should not affect OpenWrt in the default settings as we do not use EAP-pwd. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> (cherry picked from commit 9f34bf51d60a237696b1d4cc9b5f4835b95e7ea2)
* hostapd: Allow CONFIG_IEEE80211W for all but mini variantHauke Mehrtens2019-09-041-6/+2
| | | | | | | | | | This commit will activate CONFIG_IEEE80211W for all, but the mini variant when at least one driver supports it. This will add ieee80211w support for the mesh variant for example. Fixes: FS#2397 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> (cherry picked from commit 1d4df52c215874a5238ddef7bccf0139f7758c24)
* hostapd: Remove ROBO switch supportHauke Mehrtens2019-09-041-2/+0
| | | | | | | The driver was removed from OpenWrt a long time ago. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> (cherry picked from commit f34e8258340f5994a2506bd087fc6e6d4a3d5d5e)
* build: include BUILD_VARIANT in PKG_BUILD_DIRJeffery To2019-09-041-2/+0
| | | | | | | | | | | | This changes the default PKG_BUILD_DIR to take BUILD_VARIANT into account (if set), so that packages do not need to manually override PKG_BUILD_DIR just to handle variants. This also updates most base packages with variants to use the updated default PKG_BUILD_DIR. Signed-off-by: Jeffery To <jeffery.to@gmail.com> (cherry picked from commit e545fac8d968864a965edb9e50c6f90940b0a6c9)
* hostapd: remove stale WPA_SUPPLICANT_NO_TIMESTAMP_CHECK optionChristian Lamparter2019-09-041-4/+0
| | | | | | | | | | | Support to disable the timestamp check for certificates in wpa_supplicant (Useful for devices without RTC that cannot reliably get the real date/time) has been accepted in the upstream hostapd. It's implemented in wpa_supplicant as a per-AP flag tls_disable_time_checks=[0|1]. Signed-off-by: Christian Lamparter <chunkeey@gmail.com> (cherry picked from commit 99bf9a1ac2b754e708ec845059689b293d1abab0)
* hostapd: fix CVE-2019-9497, CVE-2019-9498, CVE-2019-9499Stefan Lippers-Hollmann2019-04-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | EAP-pwd missing commit validation Published: April 10, 2019 Identifiers: - CVE-2019-9497 (EAP-pwd server not checking for reflection attack) - CVE-2019-9498 (EAP-pwd server missing commit validation for scalar/element) - CVE-2019-9499 (EAP-pwd peer missing commit validation for scalar/element) Latest version available from: https://w1.fi/security/2019-4/ Vulnerability EAP-pwd implementation in hostapd (EAP server) and wpa_supplicant (EAP peer) was discovered not to validate the received scalar and element values in EAP-pwd-Commit messages properly. This could result in attacks that would be able to complete EAP-pwd authentication exchange without the attacker having to know the used password. A reflection attack is possible against the EAP-pwd server since the hostapd EAP server did not verify that the EAP-pwd-Commit contains scalar/element values that differ from the ones the server sent out itself. This allows the attacker to complete EAP-pwd authentication without knowing the password, but this does not result in the attacker being able to derive the session key (MSK), i.e., the attacker would not be able to complete the following key exchange (e.g., 4-way handshake in RSN/WPA). An attack using invalid scalar/element values is possible against both the EAP-pwd server and peer since hostapd and wpa_supplicant did not validate these values in the received EAP-pwd-Commit messages. If the used crypto library does not implement additional checks for the element (EC point), this could result in attacks where the attacker could use a specially crafted commit message values to manipulate the exchange to result in deriving a session key value from a very small set of possible values. This could further be used to attack the EAP-pwd server in a practical manner. An attack against the EAP-pwd peer is slightly more complex, but still consider practical. These invalid scalar/element attacks could result in the attacker being able to complete authentication and learn the session key and MSK to allow the key exchange to be completed as well, i.e., the attacker gaining access to the network in case of the attack against the EAP server or the attacker being able to operate a rogue AP in case of the attack against the EAP peer. While similar attacks might be applicable against SAE, it should be noted that the SAE implementation in hostapd and wpa_supplicant does have the validation steps that were missing from the EAP-pwd implementation and as such, these attacks do not apply to the current SAE implementation. Old versions of wpa_supplicant/hostapd did not include the reflection attack check in the SAE implementation, though, since that was added in June 2015 for v2.5 (commit 6a58444d27fd 'SAE: Verify that own/peer commit-scalar and COMMIT-ELEMENT are different'). Vulnerable versions/configurations All hostapd versions with EAP-pwd support (CONFIG_EAP_PWD=y in the build configuration and EAP-pwd being enabled in the runtime configuration) are vulnerable against the reflection attack. All wpa_supplicant and hostapd versions with EAP-pwd support (CONFIG_EAP_PWD=y in the build configuration and EAP-pwd being enabled in the runtime configuration) are vulnerable against the invalid scalar/element attack when built against a crypto library that does not have an explicit validation step on imported EC points. The following list indicates which cases are vulnerable/not vulnerable: - OpenSSL v1.0.2 or older: vulnerable - OpenSSL v1.1.0 or newer: not vulnerable - BoringSSL with commit 38feb990a183 ('Require that EC points are on the curve.') from September 2015: not vulnerable - BoringSSL without commit 38feb990a183: vulnerable - LibreSSL: vulnerable - wolfssl: vulnerable Acknowledgments Thanks to Mathy Vanhoef (New York University Abu Dhabi) for discovering and reporting the issues and for proposing changes to address them in the implementation. Possible mitigation steps - Merge the following commits to wpa_supplicant/hostapd and rebuild: CVE-2019-9497: EAP-pwd server: Detect reflection attacks CVE-2019-9498: EAP-pwd server: Verify received scalar and element EAP-pwd: Check element x,y coordinates explicitly CVE-2019-9499: EAP-pwd client: Verify received scalar and element EAP-pwd: Check element x,y coordinates explicitly These patches are available from https://w1.fi/security/2019-4/ - Update to wpa_supplicant/hostapd v2.8 or newer, once available Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de> [bump PKG_RELEASE] Signed-off-by: Jo-Philipp Wich <jo@mein.io>
* hostapd: fix CVE-2019-9496Stefan Lippers-Hollmann2019-04-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | hostapd: fix SAE confirm missing state validation Published: April 10, 2019 Identifiers: - CVE-2019-9496 (SAE confirm missing state validation in hostapd/AP) Latest version available from: https://w1.fi/security/2019-3/ Vulnerability When hostapd is used to operate an access point with SAE (Simultaneous Authentication of Equals; also known as WPA3-Personal), an invalid authentication sequence could result in the hostapd process terminating due to a NULL pointer dereference when processing SAE confirm message. This was caused by missing state validation steps when processing the SAE confirm message in hostapd/AP mode. Similar cases against the wpa_supplicant SAE station implementation had already been tested by the hwsim test cases, but those sequences did not trigger this specific code path in AP mode which is why the issue was not discovered earlier. An attacker in radio range of an access point using hostapd in SAE configuration could use this issue to perform a denial of service attack by forcing the hostapd process to terminate. Vulnerable versions/configurations All hostapd versions with SAE support (CONFIG_SAE=y in the build configuration and SAE being enabled in the runtime configuration). Possible mitigation steps - Merge the following commit to hostapd and rebuild: SAE: Fix confirm message validation in error cases These patches are available from https://w1.fi/security/2019-3/ - Update to hostapd v2.8 or newer, once available Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de> [bump PKG_RELEASE] Signed-off-by: Jo-Philipp Wich <jo@mein.io>
* hostapd: fix CVE-2019-9495Stefan Lippers-Hollmann2019-04-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | EAP-pwd side-channel attack Published: April 10, 2019 Identifiers: - CVE-2019-9495 (cache attack against EAP-pwd) Latest version available from: https://w1.fi/security/2019-2/ Vulnerability Number of potential side channel attacks were recently discovered in the SAE implementations used by both hostapd and wpa_supplicant (see security advisory 2019-1 and VU#871675). EAP-pwd uses a similar design for deriving PWE from the password and while a specific attack against EAP-pwd is not yet known to be tested, there is no reason to believe that the EAP-pwd implementation would be immune against the type of cache attack that was identified for the SAE implementation. Since the EAP-pwd implementation in hostapd (EAP server) and wpa_supplicant (EAP peer) does not support MODP groups, the timing attack described against SAE is not applicable for the EAP-pwd implementation. A novel cache-based attack against SAE handshake would likely be applicable against the EAP-pwd implementation. Even though the wpa_supplicant/hostapd PWE derivation iteration for EAP-pwd has protections against timing attacks, this new cache-based attack might enable an attacker to determine which code branch is taken in the iteration if the attacker is able to run unprivileged code on the victim machine (e.g., an app installed on a smart phone or potentially a JavaScript code on a web site loaded by a web browser). This depends on the used CPU not providing sufficient protection to prevent unprivileged applications from observing memory access patterns through the shared cache (which is the most likely case with today's designs). The attacker could use information about the selected branch to learn information about the password and combine this information from number of handshake instances with an offline dictionary attack. With sufficient number of handshakes and sufficiently weak password, this might result in full recovery of the used password if that password is not strong enough to protect against dictionary attacks. This attack requires the attacker to be able to run a program on the target device. This is not commonly the case on an authentication server (EAP server), so the most likely target for this would be a client device using EAP-pwd. The commits listed in the end of this advisory change the EAP-pwd implementation shared by hostapd and wpa_supplicant to perform the PWE derivation loop using operations that use constant time and memory access pattern to minimize the externally observable differences from operations that depend on the password even for the case where the attacker might be able to run unprivileged code on the same device. Vulnerable versions/configurations All wpa_supplicant and hostapd versions with EAP-pwd support (CONFIG_EAP_PWD=y in the build configuration and EAP-pwd being enabled in the runtime configuration). It should also be noted that older versions of wpa_supplicant/hostapd prior to v2.7 did not include additional protection against certain timing differences. The definition of the EAP-pwd (RFC 5931) does not describe such protection, but the same issue that was addressed in SAE earlier can be applicable against EAP-pwd as well and as such, that implementation specific extra protection (commit 22ac3dfebf7b, "EAP-pwd: Mask timing of PWE derivation") is needed to avoid showing externally visible timing differences that could leak information about the password. Any uses of older wpa_supplicant/hostapd versions with EAP-pwd are recommended to update to v2.7 or newer in addition to the mitigation steps listed below for the more recently discovered issue. Possible mitigation steps - Merge the following commits to wpa_supplicant/hostapd and rebuild: OpenSSL: Use constant time operations for private bignums Add helper functions for constant time operations OpenSSL: Use constant time selection for crypto_bignum_legendre() EAP-pwd: Use constant time and memory access for finding the PWE These patches are available from https://w1.fi/security/2019-2/ - Update to wpa_supplicant/hostapd v2.8 or newer, once available - Use strong passwords to prevent dictionary attacks Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de> [bump PKG_RELEASE] Signed-off-by: Jo-Philipp Wich <jo@mein.io>
* hostapd: fix CVE-2019-9494Stefan Lippers-Hollmann2019-04-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SAE side-channel attacks Published: April 10, 2019 Identifiers: - VU#871675 - CVE-2019-9494 (cache attack against SAE) Latest version available from: https://w1.fi/security/2019-1/ Vulnerability Number of potential side channel attacks were discovered in the SAE implementations used by both hostapd (AP) and wpa_supplicant (infrastructure BSS station/mesh station). SAE (Simultaneous Authentication of Equals) is also known as WPA3-Personal. The discovered side channel attacks may be able to leak information about the used password based on observable timing differences and cache access patterns. This might result in full password recovery when combined with an offline dictionary attack and if the password is not strong enough to protect against dictionary attacks. Cache attack A novel cache-based attack against SAE handshake was discovered. This attack targets SAE with ECC groups. ECC group 19 being the mandatory group to support and the most likely used group for SAE today, so this attack applies to the most common SAE use case. Even though the PWE derivation iteration in SAE has protections against timing attacks, this new cache-based attack enables an attacker to determine which code branch is taken in the iteration if the attacker is able to run unprivileged code on the victim machine (e.g., an app installed on a smart phone or potentially a JavaScript code on a web site loaded by a web browser). This depends on the used CPU not providing sufficient protection to prevent unprivileged applications from observing memory access patterns through the shared cache (which is the most likely case with today's designs). The attacker can use information about the selected branch to learn information about the password and combine this information from number of handshake instances with an offline dictionary attack. With sufficient number of handshakes and sufficiently weak password, this might result in full discovery of the used password. This attack requires the attacker to be able to run a program on the target device. This is not commonly the case on access points, so the most likely target for this would be a client device using SAE in an infrastructure BSS or mesh BSS. The commits listed in the end of this advisory change the SAE implementation shared by hostapd and wpa_supplicant to perform the PWE derivation loop using operations that use constant time and memory access pattern to minimize the externally observable differences from operations that depend on the password even for the case where the attacker might be able to run unprivileged code on the same device. Timing attack The timing attack applies to the MODP groups 22, 23, and 24 where the PWE generation algorithm defined for SAE can have sufficient timing differences for an attacker to be able to determine how many rounds were needed to find the PWE based on the used password and MAC addresses. When the attack is repeated with multiple times, the attacker may be able to gather enough information about the password to be able to recover it fully using an offline dictionary attack if the password is not strong enough to protect against dictionary attacks. This attack could be performed by an attacker in radio range of an access point or a station enabling the specific MODP groups. This timing attack requires the applicable MODP groups to be enabled explicitly in hostapd/wpa_supplicant configuration (sae_groups parameter). All versions of hostapd/wpa_supplicant have disabled these groups by default. While this security advisory lists couple of commits introducing additional protection for MODP groups in SAE, it should be noted that the groups 22, 23, and 24 are not considered strong enough to meet the current expectation for a secure system. As such, their use is discouraged even if the additional protection mechanisms in the implementation are included. Vulnerable versions/configurations All wpa_supplicant and hostapd versions with SAE support (CONFIG_SAE=y in the build configuration and SAE being enabled in the runtime configuration). Acknowledgments Thanks to Mathy Vanhoef (New York University Abu Dhabi) and Eyal Ronen (Tel Aviv University) for discovering the issues and for discussions on how to address them. Possible mitigation steps - Merge the following commits to wpa_supplicant/hostapd and rebuild: OpenSSL: Use constant time operations for private bignums Add helper functions for constant time operations OpenSSL: Use constant time selection for crypto_bignum_legendre() SAE: Minimize timing differences in PWE derivation SAE: Avoid branches in is_quadratic_residue_blind() SAE: Mask timing of MODP groups 22, 23, 24 SAE: Use const_time selection for PWE in FFC SAE: Use constant time operations in sae_test_pwd_seed_ffc() These patches are available from https://w1.fi/security/2019-1/ - Update to wpa_supplicant/hostapd v2.8 or newer, once available - In addition to either of the above alternatives, disable MODP groups 1, 2, 5, 22, 23, and 24 by removing them from hostapd/wpa_supplicant sae_groups runtime configuration parameter, if they were explicitly enabled since those groups are not considered strong enough to meet current security expectations. The groups 22, 23, and 24 are related to the discovered side channel (timing) attack. The other groups in the list are consider too weak to provide sufficient security. Note that all these groups have been disabled by default in all hostapd/wpa_supplicant versions and these would be used only if explicitly enabled in the configuration. - Use strong passwords to prevent dictionary attacks Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de> [bump PKG_RELEASE] Signed-off-by: Jo-Philipp Wich <jo@mein.io>
* hostapd: add Multi-AP patches and config optionsArnout Vandecappelle (Essensium/Mind)2019-02-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Cherry-pick Multi-AP commits from uptream: 9c06f0f6a hostapd: Add Multi-AP protocol support 5abc7823b wpa_supplicant: Add Multi-AP backhaul STA support a1debd338 tests: Refactor test_multi_ap bfcdac1c8 Multi-AP: Don't reject backhaul STA on fronthaul BSS cb3c156e7 tests: Update multi_ap_fronthaul_on_ap to match implementation 56a2d788f WPS: Add multi_ap_subelem to wps_build_wfa_ext() 83ebf5586 wpa_supplicant: Support Multi-AP backhaul STA onboarding with WPS 66819b07b hostapd: Support Multi-AP backhaul STA onboarding with WPS 8682f384c hostapd: Add README-MULTI-AP b1daf498a tests: Multi-AP WPS provisioning Add support for Multi-AP to the UCI configuration. Every wifi-iface gets an option 'multi_ap'. For APs, its value can be 0 (multi-AP support disabled), 1 (backhaul AP), 2 (fronthaul AP), or 3 (fronthaul + backhaul AP). For STAs, it can be 0 (not a backhaul STA) or 1 (backhaul STA, can only associate with backhaul AP). Also add new optional parameter to wps_start ubus call of wpa_supplicant to indicate that a Multi-AP backhaul link is required. Signed-off-by: Daniel Golle <daniel@makrotopia.org> Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
* hostapd: update to version 2018-12-02 (2.7)Hauke Mehrtens2019-01-021-4/+4
| | | | | | | | | | This updates hostapd to version the git version from 2018-12-02 which matches the 2.7 release. The removed patches were are already available in the upstream code, one additional backport is needed to fix a compile problem. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
* hostapd: Make eapol-test depend on libubusHauke Mehrtens2018-12-161-3/+3
| | | | | | | | The eapol-test application also uses the code with the newly activated ubus support, add the missing dependency. Fixes: f5753aae233 ("hostapd: add support for WPS pushbutton station") Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
* hostapd: add support for WPS pushbutton stationDaniel Golle2018-12-121-9/+6
| | | | | | | | | | | | | | | | | | | | | | similar to hostapd, also add a ubus interface for wpa_supplicant which will allow handling WPS push-button just as it works for hostapd. In order to have wpa_supplicant running without any network configuration (so you can use it to retrieve credentials via WPS), configure wifi-iface in /etc/config/wireless: config wifi-iface 'default_radio0' option device 'radio0' option network 'wwan' option mode 'sta' option encryption 'wps' This section will automatically be edited if credentials have successfully been acquired via WPS. Size difference (mips_24kc): roughly +4kb for the 'full' variants of wpa_supplicant and wpad which do support WPS. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* hostapd: add utf8_ssid flag & enable as defaultKevin Darbyshire-Bryant2018-11-141-1/+1
| | | | | | | | | | | | | SSIDs may contain UTF8 characters but ideally hostapd should be told this is the case so it can advertise the fact. Default enable this option. add uci option utf8_ssid '0'/'1' for disable/enable e.g. config wifi-iface option utf8_ssid '0' Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
* hostapd: add basic variantKevin Darbyshire-Bryant2018-10-161-0/+37
| | | | | | | | Add a basic variant which provides WPA-PSK only, 802.11r and 802.11w and is intended to support 11r & 11w (subject to driver support) out of the box. Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
* hostapd: fix MAC filter related log spamJo-Philipp Wich2018-10-161-1/+1
| | | | | | | | Backport two upstream fixes to address overly verbose logging of MAC ACL rejection messages. Fixes: FS#1468 Signed-off-by: Jo-Philipp Wich <jo@mein.io>
* hostapd: Add WPA-EAP-SUITE-B-192 (WPA3-Enterprise)Hauke Mehrtens2018-10-141-2/+2
| | | | | | | | | | | | This adds support for the WPA3-Enterprise mode authentication. The settings for the WPA3-Enterpriese mode are defined in WPA3_Specification_v1.0.pdf. This mode also requires ieee80211w and guarantees at least 192 bit of security. This does not increase the ipkg size by a significant size. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
* hostapd: Activate Opportunistic Wireless Encryption (OWE)Hauke Mehrtens2018-10-141-2/+2
| | | | | | | | | | | | | | | | | | OWE is defined in RFC 8110 and provides encryption and forward security for open networks. This is based on the requirements in the Wifi alliance document Opportunistic_Wireless_Encryption_Specification_v1.0_0.pdf The wifi alliance requires ieee80211w for the OWE mode. This also makes it possible to configure the OWE transission mode which allows it operate an open and an OWE BSSID in parallel and the client should only show one network. This increases the ipkg size by 5.800 Bytes. Old: 402.541 Bytes New: 408.341 Bytes Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
* hostapd: Activate Simultaneous Authentication of Equals (SAE)Hauke Mehrtens2018-10-141-2/+2
| | | | | | | | | | | | | | | | | | | | This build the full openssl and wolfssl versions with SAE support which is the main part of WPA3 PSK. This needs elliptic curve cryptography which is only provided by these two external cryptographic libraries and not by the internal implementation. The WPA3_Specification_v1.0.pdf file says that in SAE only mode Protected Management Frames (PMF) is required, in mixed mode with WPA2-PSK PMF should be required for clients using SAE, and optional for clients using WPA2-PSK. The defaults are set now accordingly. This increases the ipkg size by 8.515 Bytes. Old: 394.026 Bytes New: 402.541 Bytes Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
* hostapd: fix build of wpa-supplicant-p2pAlexander Couzens2018-09-031-0/+1
| | | | | | | VARIANT:= got removed by accident. Fixes: 3838b16943c6 ("hostapd: fix conflicts hell") Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
* hostapd: fix conflicts hellMathias Kresin2018-07-181-95/+47
| | | | | | | | | | | | | Add each variant to the matching PROVIDERS variables after evaluating the respective hostapd*, wpad* and wpa* variant. Each package providing the same feature will automatically conflict with all prior packages providing the same feature. This way we can handle the conflicts automatically without introducing recursive dependencies. Signed-off-by: Mathias Kresin <dev@kresin.me>
* hostapd: cleanup package definitionMathias Kresin2018-07-181-46/+48
| | | | | | | | | | | | Move common variables and/or values to the package (variant) default. Add additional values in variant packages if necessary. Remove further duplicates by introducing new templates. Remove the ANY_[HOSTAPD|SUPPLICANT_PROVIDERS]_PROVIDERS. The are the same as the variables without the any prefix. No need to maintain both variables. Signed-off-by: Mathias Kresin <dev@kresin.me>
* hostapd: build with LTO enabled (using jobserver for parallel build)Felix Fietkau2018-07-101-3/+4
| | | | Signed-off-by: Felix Fietkau <nbd@nbd.name>
* hostapd: properly build hostapd-only SSL variantsDaniel Golle2018-06-051-11/+11
| | | | | | | Make sure hostapd-openssl is actually build against OpenSSL, same for wolfSSL. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* hostapd: update packaging and patchesDaniel Golle2018-05-311-24/+53
| | | | | | | | | | Clean up conflicts/provides/depends hell and add PROVIDES for eapol-test variants while at it. Update mesh-DFS patchset from Peter Oh to v5 (with local fixes) which allows to drop two revert-patches for upstream commits which previously were necessary to un-break mesh-DFS support. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* hostapd: convert ssl provider build options to variantsDaniel Golle2018-05-251-54/+234
| | | | | | | | | | | Instead of selecting the SSL provider at compile time, build package variants for each option so users can select the binary package without having to build it themselves. Most likely not all variants have actually ever been user by anyone. We should reduce the selection to the reasonable and most used combinations at some point in future. For now, build them all. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* hostapd: update to git HEAD of 2018-05-21, allow build against wolfsslDaniel Golle2018-05-241-12/+31
| | | | | | | Support for building wpa_supplicant/hostapd against wolfssl has been added upstream recently, add build option to allow users using it. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* hostapd: fix VHT80 for encrypted mesh channel settingsSven Eckelmann2018-05-141-1/+1
| | | | | | | | | | | | | | | | | | | The max_oper_chwidth settings was parsed incorrectly for big endian system. This prevented the system to switch to VHT80 (or VHT160). Instead they were mapped to: * HT20: 20MHz * VHT20: 20MHz * HT40: 40MHz * VHT40: 40MHz * VHT80: 40MHz * VHT160: 40MHz This happened because each max_oper_chwidth setting in the config file was parsed as "0" instead of the actual value. Fixes: a4322eba2b12 ("hostapd: fix encrypted mesh channel settings") Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
* hostapd: fix mesh+APDaniel Golle2018-05-141-1/+1
| | | | | | | | Fix encrypted (or DFS) AP+MESH interface combination in a way similar to how it's done for AP+STA and fix netifd shell script. Refresh patches while at it. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* hostapd: fix encrypted mesh channel settingsDaniel Golle2018-04-201-1/+1
| | | | | | | | | | | | | | | Import two patches from Peter Oh to allow setting channel bandwidth in the way it already works for managed interfaces. This fixes mesh interfaces on 802.11ac devices always coming up in VHT80 mode. Add a patch to allow HT40 also on 2.4GHz if noscan option is set, which also skips secondary channel scan just like noscan works in AP mode. This time also make sure to add all files to the patch before committing it... Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* Revert "hostapd: fix encrypted mesh channel settings"Felix Fietkau2018-04-201-1/+1
| | | | | | | This reverts commit 7f52919a2f2894125b4dca611eb2d30181af7e0b, which is currently breaking the builds and needs to be reworked Signed-off-by: Felix Fietkau <nbd@nbd.name>
* hostapd: fix encrypted mesh channel settingsDaniel Golle2018-04-201-1/+1
| | | | | | | | | | | | Import two patches from Peter Oh to allow setting channel bandwidth in the way it already works for managed interfaces. This fixes mesh interfaces on 802.11ac devices always coming up in VHT80 mode. Add a patch to allow HT40 also on 2.4GHz if noscan option is set, which also skips secondary channel scan just like noscan works in AP mode. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* hostapd: mesh: make forwarding configurableDaniel Golle2018-04-181-1/+1
| | | | | | | | | | | For unencrypted mesh networks our scripts take care of setting the various mesh_param values. wpa_supplicant changes somes of them when being used for SAE encrypted mesh and previously didn't allow configuring any of them. Add support for setting mesh_fwding (which has to be set to 0 when using other routing protocols on top of 802.11s) and update our script to pass the value to wpa_supplicant. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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