From nobody Wed Sep 06 19:13:40 2023 X-Original-To: freebsd-announce@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4RgsVD57pLz4s1Vn for ; Wed, 6 Sep 2023 19:13:40 +0000 (UTC) (envelope-from security-advisories@freebsd.org) Received: from freefall.freebsd.org (freefall.freebsd.org [96.47.72.132]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "freefall.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4RgsVD3XWKz3CL6; Wed, 6 Sep 2023 19:13:40 +0000 (UTC) (envelope-from security-advisories@freebsd.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1694027620; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc; bh=Ha3i2fj+MRIRX/lDWH/cZ+ejgP1sVORJma0GNsWC5zU=; b=pccIbscA/kYulQ6AfFQLyK1ZE9LbgiGzS7w2eoXJoUr9/czQjzyOeW7FZ6UxD8oUi4t6kG qoinJkI5UU10UmEvwrBGcCOHw/WCHlhpK3wD86KQaAZF/a/IYrl3vvysjbG5QnrxKiqwC7 etsVuTN/MPPfkzH5Z+b5AcCsnYZ3TQBC4Cgnx3/9mIscIde/U5V9v+OvP4VfM7g+1PzQEA 8MUieox5gBHpv3bOBe4HNGHKtUfv35fGe986DEToUcXp4v25K4saTdl5tO0RMm3M0U1Fuf VgjhMytjs9Oultj16lfwO5gDQ9guNghGHzZ3zx7c342/rgts8yJOaftkRVRG3w== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1694027620; a=rsa-sha256; cv=none; b=hFxhq3Uo0YPaKs27KpCNoWaN9I3QJ+EbRlY38zX2d9Il6/OxcnWON4UtIOlFCwltj8xaM5 wU8AchECL/K+rNT7fX8NX5E850VpRBqlidDr1ppyze8w47ygExuJhXPTNQtdWXWxdMzSv2 bmDDSF+z8C8HqlqEkE0lQs7DOSICoHWBuwPTNOWIqqMwhVaBSRSrSZMqhiqc/UN7lJN6sl BJgNYviS43XQCI+w9V/Vv8LTkdoc39CTT4I3UEATpE4g5fXBebbR07ECsIX/WWf2yNfR/g DhhEOI/IFWmzdZGgjNhP2SQq8ERdHZ3591janrSDUqDsa77XMZSERXHQdBLxAQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1694027620; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc; bh=Ha3i2fj+MRIRX/lDWH/cZ+ejgP1sVORJma0GNsWC5zU=; b=fzD1aASFj3dpC/UikeapdXrKw4cWy+L/cCv2hp7HJIqfSiYYUZoh2EzQCM8Wg+L8lzG8kT zxAuWJg5ZwwX6wdti6fU9HlZULHotSm8BgradeRUQ/c2z+GmG6fC9k7pxBVW2XRcX78bu0 Dqer2tPsqu9L8SH7RhKPyuaa95gTfRsYzdgFBNpDiLgNS1h5zpTwg3uyXxKwSy6Qr5sRQK 42gEF3CegjemnlBLHY8y59ZjB0NLQJ3fMI7jQniGLSbi+jqn8CUhN6dtdCxKzubXmmAKX7 aiWdGb+0Cj2N6mfgQRX5+E7BPdClqxwSKrAekQ+N4a60VIl/I/Squ9MjZaglew== Received: by freefall.freebsd.org (Postfix, from userid 945) id 55EB111D92; Wed, 6 Sep 2023 19:13:40 +0000 (UTC) From: FreeBSD Security Advisories To: FreeBSD Security Advisories Subject: FreeBSD Security Advisory FreeBSD-SA-23:11.wifi Reply-To: freebsd-security@freebsd.org Precedence: bulk Message-Id: <20230906191340.55EB111D92@freefall.freebsd.org> Date: Wed, 6 Sep 2023 19:13:40 +0000 (UTC) List-Id: Project Announcements [moderated] List-Archive: https://lists.freebsd.org/archives/freebsd-announce List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-announce@freebsd.org X-BeenThere: freebsd-announce@freebsd.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-23:11.wifi Security Advisory The FreeBSD Project Topic: Wi-Fi encryption bypass Category: core Module: net80211 Announced: 2023-09-06 Credits: See the paper linked in the References section. Affects: All supported versions of FreeBSD. Corrected: 2023-06-26 12:02:00 UTC (stable/13, 13.2-STABLE) 2023-09-06 17:13:25 UTC (releng/13.2, 13.2-RELEASE-p3) 2023-06-26 12:30:23 UTC (stable/12, 12.4-STABLE) 2023-09-06 17:38:34 UTC (releng/12.4, 12.4-RELEASE-p5) CVE Name: CVE-2022-47522 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit . I. Background FreeBSD's net80211 kernel subsystem provides infrastructure and drivers for IEEE 802.11 wireless (Wi-Fi) communications. Wi-Fi communications rely on both unicast and multicast keys to secure transmissions. II. Problem Description The net80211 subsystem would fallback to the multicast key for unicast traffic in the event the unicast key was removed. This would result in buffered unicast traffic being exposed to any stations with access to the multicast key. III. Impact As described in the "Framing Frames: Bypassing Wi-Fi Encryption by Manipulating Transmit Queues" paper, an attacker can induce an access point to buffer frames for a client, deauthenticate the client (causing the unicast key to be removed from the access point), and subsequent flushing of the buffered frames now encrypted with the multicast key. This would give the attacker access to the data. IV. Workaround No workaround is available. Systems not using Wi-Fi are not affected. V. Solution Upgrade your vulnerable system to a supported FreeBSD stable or release / security branch (releng) dated after the correction date and reboot Perform one of the following: 1) To update your vulnerable system via a binary patch: Systems running a RELEASE version of FreeBSD on the amd64, i386, or (on FreeBSD 13 and later) arm64 platforms can be updated via the freebsd-update(8) utility: # freebsd-update fetch # freebsd-update install # shutdown -r +10min "Rebooting for a security update" 2) To update your vulnerable system via a source code patch: The following patches have been verified to apply to the applicable FreeBSD release branches. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. # fetch https://security.FreeBSD.org/patches/SA-23:11/wifi.patch # fetch https://security.FreeBSD.org/patches/SA-23:11/wifi.patch.asc # gpg --verify wifi.patch.asc b) Apply the patch. Execute the following commands as root: # cd /usr/src # patch < /path/to/patch c) Recompile your kernel as described in and reboot the system. VI. Correction details This issue is corrected by the corresponding Git commit hash or Subversion revision number in the following stable and release branches: Branch/path Hash Revision - ------------------------------------------------------------------------- stable/13/ 6c9bcecfb296 stable/13-n255680 releng/13.2/ 7f34ee7cc56b releng/13.2-n254632 stable/12/ r373115 releng/12.4/ r373187 - ------------------------------------------------------------------------- For FreeBSD 13 and later: Run the following command to see which files were modified by a particular commit: # git show --stat Or visit the following URL, replacing NNNNNN with the hash: To determine the commit count in a working tree (for comparison against nNNNNNN in the table above), run: # git rev-list --count --first-parent HEAD For FreeBSD 12 and earlier: Run the following command to see which files were modified by a particular revision, replacing NNNNNN with the revision number: # svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base Or visit the following URL, replacing NNNNNN with the revision number: VII. References The latest revision of this advisory is available at -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEthUnfoEIffdcgYM7bljekB8AGu8FAmT4vywACgkQbljekB8A Gu+GuRAA1BydNZjSchRULzII3OtSfiF2Q3fF+d6bXOuUKuEOgKJvguTdeg1vqlOK 4V/1pEOUfYQE+nn+7s4Dc8L3TKLcPECYo8nvaO+5JvhEDpEbmHZRf9P6vz9Isi5X jjDP+ybY5pl1Gv74AkPeWzp9OZxBBAp/CJcpAMS/y3Onn3J6Okwsns5TXlaPA401 /iamphDSBhH1fUP0OeE9fFAWZrVnFHkrDNr+T+dd7vFyr964g/xRCQaCI5mDf+Z3 dYIydrOgdvmev/7h460bygz+NOQ5Hd+YAgHmNbXZd9WUvE0iJtFZh2EPWshSNmRj 5Tw+VocK8xRNCL0w6owC5Ag/pAAHURY7ffJbgMv5N4xAp6js9MSggIsyJ0YV1Own 4JfAXPib6YTlhdfHWoUaaFSRBPCOoF72mj7jTMCz/iFJj78XMtp/rk9iGT5cfKsF RQ7zfqm6qbg9lEbjGAM2OR4SWvW2umiiXDZDTKHyGzdWoFA6WNlkKIxYi8e7ti9E ksvqDN1v9A6FD3KD+ygPCVvAZwxbFmInAd5HPZFi8UjdhFZ4ql5HYFfjTVBmE1co H+I1apa+9Ssq7CRQmAc/blY03i/SmhTNNNnNoIbwAC4DLI9nx/orYdoJksaneYkP QcOT19Jh83UYGHx2bqlVZGfggvXQgwffXhLliLwwUxtCJhGwElQ= =lSpK -----END PGP SIGNATURE-----