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* 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: fix faulty WMM IE parameters with ETSI regulatory domainsFelix Fietkau2020-01-232-0/+88
| | | | | | | | hostapd sets minimum values for CWmin/CWmax/AIFS and maximum for TXOP. The code for applying those values had a few bugs leading to bogus values, which caused significant latency and packet loss. Signed-off-by: Felix Fietkau <nbd@nbd.name>
* hostapd: cleanup IBSS-RSNDaniel Golle2020-01-162-6/+2
| | | | | | | 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 IEEE 802.11k supportKyle Copperfield2019-11-141-0/+13
| | | | | | | | | | | | Enables radio resource management to be reported by hostapd to clients. Ref: https://github.com/lede-project/source/pull/1430 Co-developed-by: Lorenzo Santina <lorenzo.santina@edu.unito.it> Signed-off-by: Lorenzo Santina <lorenzo.santina@edu.unito.it> Signed-off-by: Kyle Copperfield <kmcopper@danwin1210.me> [removed the DMARC crap] Signed-off-by: Petr Štetiar <ynezz@true.cz> (cherry picked from commit 87f9292300cf56ad17f44363ced213c59a95ef44)
* 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: use getrandom syscallHauke Mehrtens2019-11-147-7/+7
| | | | | | | | | hostapd will not use the getrandom() syscall and as a fallback use /dev/random, the syscall is supported since Linux 3.17 and in the musl, glibc and uclibc version used by OpenWrt. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> (cherry picked from commit 998686364da7d002ba9f6dbb43cc5f32294dd4ab)
* hostapd: Remove unneeded patchHauke Mehrtens2019-11-148-28/+14
| | | | | | | | All the content of this function is proceeded by IEEE8021X_EAPOL no code accesses the ssid variable outside of this ifdef. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> (cherry picked from commit 0d86bf518aaefa57bef577d09a18aff03eccb70c)
* hostapd: use config option CONFIG_NO_LINUX_PACKET_SOCKET_WARHauke Mehrtens2019-11-145-16/+4
| | | | | | | Instead of patching the workaround away, just use the config option. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> (cherry picked from commit 9b4a27455c17c00698ce7ce24e0bcad419c6319e)
* hostapd: Update to version 2.9 (2019-08-08)Hauke Mehrtens2019-11-1447-639/+272
| | | | | | | | | | | | | | | | | | | 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 Mehrtens2019-11-1489-5673/+532
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Wich2019-11-142-1/+10
| | | | | | | | | | | | 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 Wich2019-11-142-1/+2
| | | | | | | | | 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: declare struct wpa_bss earlyLeon M. George2019-11-141-0/+19
| | | | | | | | | | | | | | | | | wps_supplicant.h assumes that 'struct wpa_bss' is forward declared if CONFIG_WPS is not defined. With the later inclusion of 600-ubus_support, the issue manifests in warnings like these: wps_supplicant.h:113:15: warning: 'struct wpa_bss' declared inside parameter list will not be visible outside of this definition or declaration struct wpa_bss *bss) ^~~~~~~ This patch forward declares 'struct wpa_bss' regardless. Signed-off-by: Leon M. George <leon@georgemail.eu> [commit message facelift] Signed-off-by: Petr Štetiar <ynezz@true.cz> (cherry picked from commit f974f8213b94578581b35e6b3f8fb1fd5a35f753)
* hostapd: revert signature change in patchLeon M. George2019-11-141-1/+1
| | | | | | | | | | | | | The original wpa_hexdump uses a 'void *' for the payload. With patch 410-limit_debug_messages, the signature changes and compiler warnings occur at various places. One such warning is: wpa_debug.h:106:20: note: expected 'const u8 * {aka const unsigned char *}' but argument is of type 'struct wpa_eapol_key *' Signed-off-by: Leon M. George <leon@georgemail.eu> [commit message facelift] Signed-off-by: Petr Štetiar <ynezz@true.cz> (cherry picked from commit a123df275846b1b83aaf3d7488a1544f7c0e09aa)
* hostapd: adjust removed wolfssl optionsEneas U de Queiroz2019-11-141-4/+0
| | | | | | | | | | This edjusts the selection of recently removed wolfssl options which have always been built into the library even in their abscence. Also remove the selection of libwolfssl itself, allowing the library to be built as a module. Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com> (cherry picked from commit 94d131332b5adbcf885a92608c40a22b79b3c708)
* hostapd: enable PMKSA and OK caching for WPA3-PersonalDavid Bauer2019-11-051-1/+8
| | | | | | | | | | | | | | | This enables PMKSA and opportunistic key caching by default for WPA2/WPA3-Personal, WPA3-Personal and OWE auth types. Otherwise, Apple devices won't connect to the WPA3 network. This should not degrade security, as there's no external authentication provider. Tested with OCEDO Koala and iPhone 7 (iOS 13.1). Signed-off-by: David Bauer <mail@david-bauer.net> (cherry picked from commit 3034f8c3b85e70b1dd9b4cd5cd33e9d2cd8be3b8) Signed-off-by: David Bauer <mail@david-bauer.net>
* hostapd: adjust to removal of WOLFSSL_HAS_AES_GCMEneas U de Queiroz2019-10-191-1/+0
| | | | | | | WolfSSL is always built with AES-GCM support now. Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com> (cherry picked from commit ee5a3f6d605602bbff57cde337235088cf9c3ffa)
* hostapd: Fix AP mode PMF disconnection protection bypassHauke Mehrtens2019-09-214-6/+72
| | | | | | | | | This fixes * CVE-2019-16275 AP mode PMF disconnection protection bypass https://w1.fi/security/2019-7/ap-mode-pmf-disconnection-protection-bypass.txt Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> (cherry picked from commit a6981604b30bc1ddc1713b368fe853d89c2ba40d)
* hostapd: SAE/EAP-pwd side-channel attack updateHauke Mehrtens2019-09-109-1/+397
| | | | | | | | | 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 Mehrtens2019-09-103-1/+81
| | | | | | | | | | | | 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 Lamparter2019-09-042-26/+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-Hollmann2019-04-115-1/+467
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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-Hollmann2019-04-112-1/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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-Hollmann2019-04-112-1/+320
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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-Hollmann2019-04-119-1/+1083
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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)2019-02-2015-20/+2230
| | | | | | | | | | | | | | | | | | | | | | | | | | 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 the fix for a race condition in mesh new peer handlingFelix Fietkau2019-02-171-2/+2
| | | | | | | Prevent the mesh authentication state machine from getting reset on bogus new peer discovery Signed-off-by: Felix Fietkau <nbd@nbd.name>
* hostapd: enable CONFIG_DEBUG_SYSLOG for wpa_supplicantFelix Fietkau2019-02-174-8/+8
| | | | | | | It was already enabled for wpad builds and since commit 6a15077e2d7fa the script relies on it. Size impact is minimal (2 kb on MIPS .ipk). Signed-off-by: Felix Fietkau <nbd@nbd.name>
* hostapd: fix race condition in mesh new peer handlingFelix Fietkau2019-02-121-0/+34
| | | | | | Avoid trying to add the same station to the driver multiple times Signed-off-by: Felix Fietkau <nbd@nbd.name>
* hostapd: send wpa_supplicant logging output to syslogFelix Fietkau2019-02-121-1/+1
| | | | | | Helpful for debugging network connectivity issues Signed-off-by: Felix Fietkau <nbd@nbd.name>
* wpa_supplicant: fix calling channel switch via wpa_cli on mesh interfacesFelix Fietkau2019-01-291-0/+39
| | | | Signed-off-by: Felix Fietkau <nbd@nbd.name>
* hostapd: add support for passing CSA events from sta/mesh to AP interfacesFelix Fietkau2019-01-292-2/+183
| | | | | | Fixes handling CSA when using AP+STA or AP+Mesh Signed-off-by: Felix Fietkau <nbd@nbd.name>
* hostapd: update to version 2018-12-02 (2.7)Hauke Mehrtens2019-01-0238-429/+169
| | | | | | | | | | 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 Golle2018-12-1210-14/+467
| | | | | | | | | | | | | | | | | | | | | | 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-Bryant2018-11-142-3/+5
| | | | | | | | | | | | | 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-Bryant2018-10-164-0/+1016
| | | | | | | | 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 Wich2018-10-164-11/+78
| | | | | | | | 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 Mehrtens2018-10-143-5/+18
| | | | | | | | | | | | 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 Mehrtens2018-10-143-4/+21
| | | | | | | | | | | | | | | | | | 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 Mehrtens2018-10-143-9/+42
| | | | | | | | | | | | | | | | | | | | 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: SAE: Do not ignore option sae_require_mfpHauke Mehrtens2018-10-141-0/+26
| | | | | | This patch was send for integration into the hostapd project. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
* hostapd: backport build fix when OWE is activatedHauke Mehrtens2018-10-145-18/+35
| | | | | | This backports a compile fix form the hostapd project. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
* hostapd: sync config with default configurationHauke Mehrtens2018-10-145-35/+41
| | | | | | | | | This replaces the configuration files with the versions from the hostapd project and the adaptions done by OpenWrt. The resulting binaries should be the same. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
* hostapd: add acs feature indicationEnrique Giraldo2018-09-291-0/+4
| | | | Signed-off-by: Enrique Giraldo <enrique.giraldo@galgus.net>
* hostapd: Fix compile with OpenSSL 1.1.0 + no deprecated APIsRosen Penev2018-09-101-0/+40
| | | | | | | | Patch was accepted upsteam: https://w1.fi/cgit/hostap/commit/?id=373c796948599a509bad71695b5b72eef003f661 Signed-off-by: Rosen Penev <rosenp@gmail.com>
* 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>
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