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* 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)
* uhttpd: add support to generate EC keysEneas U de Queiroz2019-09-043-2/+14
| | | | | | | | | This adds the key_type and ec_curve options to enable the generation of EC keys during initialization, using openssl or the new options added to px5g. Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com> (cherry picked from commit 7f2b230b3b9d0a7fb758db3a9b1958845506a5a3)
* 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)
* dnsmasq: use nettle ecc_curve access functionsHans Dedecker2019-09-042-1/+36
| | | | | | | Fixes compile issues with nettle 3.5.1 Signed-off-by: Hans Dedecker <dedeckeh@gmail.com> (cherry picked from commit 63ced140484e072dddbba39bb729adc98d94d522)
* build: include BUILD_VARIANT in PKG_BUILD_DIRJeffery To2019-09-044-7/+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)
* openvpn: add new list option tls_ciphersuitesMartin Schiller2019-09-041-1/+2
| | | | | | | | To configure the list of allowable TLS 1.3 ciphersuites, the option tls_ciphersuites is used instead of tls_ciphers. Signed-off-by: Martin Schiller <ms@dev.tdt.de> (cherry picked from commit 261df949faad6dda43454868628f79265e9cc5e7)
* wireguard: bump to 0.0.20190702Jason A. Donenfeld2019-09-041-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * curve25519: not all linkers support bmi2 and adx This should allow WireGuard to build on older toolchains. * global: switch to coarse ktime Our prior use of fast ktime before meant that sometimes, depending on how broken the motherboard was, we'd wind up calling into the HPET slow path. Here we move to coarse ktime which is always super speedy. In the process we had to fix the resolution of the clock, as well as introduce a new interface for it, landing in 5.3. Older kernels fall back to a fast-enough mechanism based on jiffies. https://lore.kernel.org/lkml/tip-e3ff9c3678b4d80e22d2557b68726174578eaf52@git.kernel.org/ https://lore.kernel.org/lkml/20190621203249.3909-3-Jason@zx2c4.com/ * netlink: cast struct over cb->args for type safety This follow recent upstream changes such as: https://lore.kernel.org/lkml/20190628144022.31376-1-Jason@zx2c4.com/ * peer: use LIST_HEAD macro Style nit. * receive: queue dead packets to napi queue instead of empty rx_queue This mitigates a WARN_ON being triggered by the workqueue code. It was quite hard to trigger, except sporadically, or reliably with a PC Engines ALIX, an extremely slow board with an AMD LX800 that Ryan Whelan of Axatrax was kind enough to mail me. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> (cherry picked from commit 7c23f741e97f6645bb5cd662a4943796a344b26a)
* 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)
* odhcpd: various fixesHans Dedecker2019-09-031-3/+3
| | | | | | | 8f1347b odhcpd: router: Fix out of scope memory access d37736e dhcpv6-ia: free assignment when validity timer expires Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* odhcpd: remove socket from uloop upon NETEV_IFINDEX_CHANGEHans Dedecker2019-08-191-3/+3
| | | | | | 949476e router: close socket upon NETEV_IFINDEX_CHANGE fixed Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* uhttpd: update to latest Git HEADJo-Philipp Wich2019-08-181-3/+3
| | | | | | | 6b03f96 ubus: increase maximum ubus request size to 64KB Signed-off-by: Jo-Philipp Wich <jo@mein.io> (cherry picked from commit d1f207ecc9f045e091d7008d86f0449bcf0b35bc)
* uhttpd: add direct dependency on libjson-cJo-Philipp Wich2019-08-181-1/+1
| | | | | | | | | | | | The OpenWrt buildroot ABI version rebuild tracker does not handle transient dependencies, therefor add all libraries linked by uhttpd as direct dependencies to the corresponding binary package definition. This ensures that uhttpd is automatically rebuilt and relinked if any of these libraries has its ABI_VERSION updated in the future. Signed-off-by: Jo-Philipp Wich <jo@mein.io> (cherry picked from commit a95ddaba0272f254a3aeade3aa0c086e1625d672)
* uhttpd: Fix format string build problemsHauke Mehrtens2019-08-181-3/+3
| | | | | | | | | 91fcac34ac uhttpd: Fix multiple format string problems Fixes: fc454ca15305 libubox: update to latest git HEAD Reported-by: Hannu Nyman <hannu.nyman@iki.fi> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> (cherry picked from commit 3c401f45c988aa6333a03efea1b1ac0318a8c11d)
* odhcpd: fix closing of router socketHans Dedecker2019-08-171-3/+3
| | | | | | c2d6032 router: fix previous commit Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* odhcpd: fix sending RA when link state brings bridge downHans Dedecker2019-08-161-3/+3
| | | | | | 13928b3 router: close socket upon NETEV_IFINDEX_CHANGE Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* odhcpd: fix lingering uloop socket descriptorHans Dedecker2019-08-101-3/+3
| | | | | | e9e8240 router: fix lingering uloop socket descriptor Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* openvpn: fix handling of list optionsMatt Merhar2019-07-172-3/+4
| | | | | | | | | | | | | | | This addresses an issue where the list option specified in /etc/config/openvpn i.e. 'tls_cipher' would instead show up in the generated openvpn-<name>.conf as 'ncp-ciphers'. For context, 'ncp_ciphers' appears after 'tls_cipher' in OPENVPN_LIST from openvpn.options. Also, the ordering of the options in the UCI config file is now preserved when generating the OpenVPN config. The two currently supported list options deal with cipher preferences. Signed-off-by: Matt Merhar <mattmerhar@protonmail.com> (cherry picked from commit 1d4c4cbd20580dd211431ab58460a6eebd5e021e)
* dnsmasq: move feature detection inside a shell funcYousong Zhou2019-06-112-7/+10
| | | | | | | Resolves openwrt/packages#9219 Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com> (cherry picked from commit 04b45d3a31fac45c472ad3c31d98268d1c309763)
* dnsmasq: skip options that are not compiled inYousong Zhou2019-06-092-3/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is to make life easier for users with customized build of dnsmasq-full variant. Currently dnsmasq config generated by current service script will be rejected by dnsmasq build lacking DHCP feature - Options like --dhcp-leasefile have default values. Deleting them from uci config or setting them to empty value will make them take on default value in the end - Options like --dhcp-broadcast are output unconditionally Tackle this by - Check availablility of features from output of "dnsmasq --version" - Make a list of options guarded by HAVE_xx macros in src/options.c of dnsmasq source code - Ignore these options in xappend() Two things to note in this implementation - The option list is not exhaustive. Supposedly only those options that may cause dnsmasq to reject with "unsupported option (check that dnsmasq was compiled with DHCP/TFTP/DNSSEC/DBus support)" are taken into account here - This provides a way out but users' cooperation is still needed. E.g. option dnssec needs to be turned off, otherwise the service script will try to add --conf-file pointing to dnssec specific anchor file which dnsmasq lacking dnssec support will reject Resolves FS#2281 Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
* wireguard: bump to 0.0.20190601Jason A. Donenfeld2019-06-011-2/+2
| | | | | | | | | | | | | | There was an issue with the backport compat layer in yesterday's snapshot, causing issues on certain (mostly Atom) Intel chips on kernels older than 4.2, due to the use of xgetbv without checking cpu flags for xsave support. This manifested itself simply at module load time. Indeed it's somewhat tricky to support 33 different kernel versions (3.10+), plus weird distro frankenkernels. If OpenWRT doesn't support < 4.2, you probably don't need to apply this. But it also can't hurt, and probably best to stay updated. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* wireguard: bump to 0.0.20190531Jason A. Donenfeld2019-05-311-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * tools: add wincompat layer to wg(8) Consistent with a lot of the Windows work we've been doing this last cycle, wg(8) now supports the WireGuard for Windows app by talking through a named pipe. You can compile this as `PLATFORM=windows make -C src/tools` with mingw. Because programming things for Windows is pretty ugly, we've done this via a separate standalone wincompat layer, so that we don't pollute our pretty *nix utility. * compat: udp_tunnel: force cast sk_data_ready This is a hack to work around broken Android kernel wrapper scripts. * wg-quick: freebsd: workaround SIOCGIFSTATUS race in FreeBSD kernel FreeBSD had a number of kernel race conditions, some of which we can vaguely work around. These are in the process of being fixed upstream, but probably people won't update for a while. * wg-quick: make darwin and freebsd path search strict like linux Correctness. * socket: set ignore_df=1 on xmit This was intended from early on but didn't work on IPv6 without the ignore_df flag. It allows sending fragments over IPv6. * qemu: use newer iproute2 and kernel * qemu: build iproute2 with libmnl support * qemu: do not check for alignment with ubsan The QEMU build system has been improved to compile newer versions. Linking against libmnl gives us better error messages. As well, enabling the alignment check on x86 UBSAN isn't realistic. * wg-quick: look up existing routes properly * wg-quick: specify protocol to ip(8), because of inconsistencies The route inclusion check was wrong prior, and Linux 5.1 made it break entirely. This makes a better invocation of `ip route show match`. * netlink: use new strict length types in policy for 5.2 * kbuild: account for recent upstream changes * zinc: arm64: use cpu_get_elf_hwcap accessor for 5.2 The usual churn of changes required for the upcoming 5.2. * timers: add jitter on ack failure reinitiation Correctness tweak in the timer system. * blake2s,chacha: latency tweak * blake2s: shorten ssse3 loop In every odd-numbered round, instead of operating over the state x00 x01 x02 x03 x05 x06 x07 x04 x10 x11 x08 x09 x15 x12 x13 x14 we operate over the rotated state x03 x00 x01 x02 x04 x05 x06 x07 x09 x10 x11 x08 x14 x15 x12 x13 The advantage here is that this requires no changes to the 'x04 x05 x06 x07' row, which is in the critical path. This results in a noticeable latency improvement of roughly R cycles, for R diagonal rounds in the primitive. As well, the blake2s AVX implementation is now SSSE3 and considerably shorter. * tools: allow setting WG_ENDPOINT_RESOLUTION_RETRIES System integrators can now specify things like WG_ENDPOINT_RESOLUTION_RETRIES=infinity when building wg(8)-based init scripts and services, or 0, or any other integer. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* ppp: add config options to tune discovery timeout and attemptsHans Dedecker2019-05-312-1/+8
| | | | | | | | | | | Upstream PPP project has added in commit 8e77984 options to tune discovery timeout and attempts in the rp-pppoe plugin. Expose these options in the uci datamodel for pppoe: padi_attempts: Number of discovery attempts padi_timeout: Initial timeout for discovery packets in seconds Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* ppp: update to version 2.4.7.git-2019-05-25Hans Dedecker2019-05-311-3/+3
| | | | | | 8e77984 rp-pppoe plugin: Add options to tune discovery timeout and number of attempts Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* ppp: update to version 2.4.7.git-2019-05-18Hans Dedecker2019-05-186-287/+7
| | | | | | | | | | | c9d9dbf pppoe: Custom host-uniq tag 44012ae plugins/rp-pppoe: Fix compile errors Refresh patches Drop 520-uniq patch as upstream accepted Drop 150-debug_compile_fix patch as fixed upstream Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* odhcpd: update to latest git HEAD (FS#2242)Hans Dedecker2019-05-171-3/+3
| | | | | | | | | | | | | | | | | | 41a74cb config: remove 'ignore' config option c0c8034 treewide: init assignment lists head f98b7ee config: use list safe iterator in lease_delete 3c9810b dhcpv4: fix lease ordering by ip address b60c384 config: use multi-stage parsing of uci sections a2dd8d6 treewide: always init interface list heads during initialization a17665e dhcpv4: do not allow pool end address to overlap with broadcast address 6b951c5 treewide: give file descriptors safe initial value 39e11ed dhcpv4: DHCP pool size is off-by-one 4a600ce dhcpv4: add support for Parameter Request List option 55 09e5eca dhcpv4: fix DHCP packet size 3cd4876 ndp: fix syslog flooding (FS#2242) 79fbba1 config: set default loglevel to LOG_WARNING Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* ppp: update to version 2.4.7.git-2019-05-06Hans Dedecker2019-05-138-32/+32
| | | | | | | fcb076c Various fixes for errors found by coverity static analysis (#109) d98ab38 Merge branch 'pppd_print_changes' of https://github.com/nlhintz/ppp into nlhintz-pppd_print_changes Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* lldpd: add option to edit hostnameLucian Cristian2019-05-112-0/+5
| | | | | | | also fixes the annoying repeating syslog lldp[]: unable to get system name Signed-off-by: Lucian Cristian <lucian.cristian@gmail.com>
* lldpd: update to 1.0.3Lucian Cristian2019-05-112-11/+25
| | | | | | Support for CDP PD PoE Signed-off-by: Lucian Cristian <lucian.cristian@gmail.com>
* Revert "uhttpd: disable concurrent requests by default"Jo-Philipp Wich2019-04-232-2/+2
| | | | | | | | | | This reverts commit c6aa9ff38870a30dbe6da17e4edad6039fe10ddf. Further testing has revealed that we will need to allow concurrent requests after all, especially for situations where CGI processes initiate further HTTP requests to the local host. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
* odhcpd: update to latest git HEAD (FS#2243, FS#2244)Hans Dedecker2019-04-191-3/+3
| | | | | | 6633efe router: fix dns search list option Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* dropbear: allow build without dbclientRosy Song2019-04-182-4/+9
| | | | | | This can save ~16KBytes size for the ipk Signed-off-by: Rosy Song <rosysong@rosinson.com>
* odhcpd: update to latest git HEAD (FS#2206)Hans Dedecker2019-04-171-3/+3
| | | | | | | | | | | | 38bc630 router: use ra_lifetime as lifetime for RA options (FS#2206) 0523bdd router: improve code readibility 0a3b279 Revert "router:" 207f8e0 treewide: align syslog loglevels f1d7da9 router: 0e048ac treewide: fix compiler warnings 83698f6 CMakeList.txt: enable extra compiler checks Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* 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>
* wireguard: remove obvious commentsFlorian Eckert2019-04-091-9/+0
| | | | | | Remove obvious comments to save disk space. Signed-off-by: Florian Eckert <fe@dev.tdt.de>
* wireguard: converted whitespaces from space to tabFlorian Eckert2019-04-091-176/+169
| | | | | | | | | With this change, the file is reduced from 5186 bytes to 4649 bytes that its approximately 10.5 percent less memory consumption. For small devices, sometimes every byte counts. Also, all other protocol handler use tabs instead of spaces. Signed-off-by: Florian Eckert <fe@dev.tdt.de>
* dropbear: bump to 2019.78Hans Dedecker2019-04-072-48/+2
| | | | | | | | | | Fix dbclient regression in 2019.77. After exiting the terminal would be left in a bad state. Reported by Ryan Woodsmall drop patch applied upstream: 010-tty-modes-werent-reset-for-client.patch Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* wireguard: bump to 0.0.20190406Jason A. Donenfeld2019-04-061-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * allowedips: initialize list head when removing intermediate nodes Fix for an important regression in removing allowed IPs from the last snapshot. We have new test cases to catch these in the future as well. * tools: warn if an AllowedIP has a nonzero host part If you try to run `wg set wg0 peer ... allowed-ips 192.168.1.82/24`, wg(8) will now print a warning. Even though we mask this automatically down to 192.168.1.0/24, usually when people specify it like this, it's a mistake. * wg-quick: add 'strip' subcommand The new strip subcommand prints the config file to stdout after stripping it of all wg-quick-specific options. This enables tricks such as: `wg addconf $DEV <(wg-quick strip $DEV)`. * tools: avoid unneccessary next_peer assignments in sort_peers() Small C optimization the compiler was probably already doing. * peerlookup: rename from hashtables * allowedips: do not use __always_inline * device: use skb accessor functions where possible Suggested tweaks from Dave Miller. * blake2s: simplify * blake2s: remove outlen parameter from final The blake2s implementation has been simplified, since we don't use any of the fancy tree hashing parameters or the like. We also no longer separate the output length at initialization time from the output length at finalization time. * global: the _bh variety of rcu helpers have been unified * compat: nf_nat_core.h was removed upstream * compat: backport skb_mark_not_on_list The usual assortment of compat fixes for Linux 5.1. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
* odhcpd: update to latest git HEADHans Dedecker2019-04-051-3/+3
| | | | | | | | 65a9519 ndp: create ICMPv6 socket per interface c6dae8e router: create ICMPv6 socket per interface e7b1d4b treewide: initialize properly file descriptors Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* openvpn: openssl: explicitly depend on deprecated APIsMagnus Kroken2019-04-031-1/+1
| | | | | | | | OpenVPN as of 2.4.7 uses some OpenSSL APIs that are deprecated in OpenSSL >= 1.1.0. Signed-off-by: Magnus Kroken <mkroken@gmail.com> Signed-off-by: Hans Dedecker <dedeckeh@gmail.com> [white space fix]
* openvpn: update to 2.4.7Magnus Kroken2019-04-013-5/+5
| | | | Signed-off-by: Magnus Kroken <mkroken@gmail.com>
* odhcpd: update to latest git HEADHans Dedecker2019-03-291-3/+3
| | | | | | | 7798d50 netlink: rework IPv4 address refresh logic 0b20876 netlink: rework IPv6 address refresh logic Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* wireguard: introduce 'nohostroute' optionDaniel Golle2019-03-271-1/+2
| | | | | | | | | | Instead of creating host-routes depending on fwmark as (accidentally) pushed by commit 1e8bb50b93 ("wireguard: do not add host-dependencies if fwmark is set") use a new config option 'nohostroute' to explicitely prevent creation of the route to the endpoint. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* wireguard: do not add host-dependencies if fwmark is setDaniel Golle2019-03-271-6/+8
| | | | | | | | | | The 'fwmark' option is used to define routing traffic to wireguard endpoints to go through specific routing tables. In that case it doesn't make sense to setup routes for host-dependencies in the 'main' table, so skip setting host dependencies if 'fwmark' is set. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* odhcpd: update to latest git HEAD (FS#2204)Hans Dedecker2019-03-271-3/+3
| | | | | | 420945c netlink: fix IPv6 address updates (FS#2204) Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
* dropbear: split ECC support to basic and fullKonstantin Demin2019-03-252-8/+31
| | | | | | | | | | - limit ECC support to ec*-sha2-nistp256: * DROPBEAR_ECC now provides only basic support for ECC - provide full ECC support as an option: * DROPBEAR_ECC_FULL brings back support for ec{dh,dsa}-sha2-nistp{384,521} - update feature costs in binary size Signed-off-by: Konstantin Demin <rockdrilla@gmail.com>
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