From owner-freebsd-security-notifications@freebsd.org Fri Jan 29 02:28:27 2021 Return-Path: Delivered-To: freebsd-security-notifications@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 090AB4F6035 for ; Fri, 29 Jan 2021 02:28:27 +0000 (UTC) (envelope-from security-advisories@freebsd.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2610:1c1:1:6074::16:84]) (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 4DRh8p6xRCz3MyV; Fri, 29 Jan 2021 02:28:26 +0000 (UTC) (envelope-from security-advisories@freebsd.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1611887307; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc; bh=FDoG4uGEqDUwx6unqNKKWM302kjiThFgKeCUu6Ip6DA=; b=Yty96Ge0keS+ZLRpECBnV1f8epU1623qknF6NeJMaqw6lxTFCTBTAfoqcKUIFnwyaUy6U2 GQUl4VFli/MF+NJSenR8ToON/eP4PILENe/oGOg8olG9kwVEAwO0RxcKd0j8Bce9FqWePL bQA4qKQtcSJ2whniLdggINtEyO7lgQ2eo8JW57Pf1Cz8SItvMqPqV/98cksHnqyDvP2ApN jXwdoNYfPnzrgRuTYLnydWzzMlzAnQbBaoF5PqO8jFZOkDF+tj26JIBk7Wd1ZRR7ht1PZb g1pqF8bud62hdunEGqJvYFHhft3bxBKxJzlOXZzfI2fsQYyW/7S3v++i8ZGWLQ== Received: by freefall.freebsd.org (Postfix, from userid 945) id DEB791DBAC; Fri, 29 Jan 2021 02:28:26 +0000 (UTC) From: FreeBSD Security Advisories To: FreeBSD Security Advisories Subject: FreeBSD Security Advisory FreeBSD-SA-21:01.fsdisclosure Reply-To: freebsd-security@freebsd.org Precedence: bulk Message-Id: <20210129022826.DEB791DBAC@freefall.freebsd.org> Date: Fri, 29 Jan 2021 02:28:26 +0000 (UTC) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1611887307; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc; bh=FDoG4uGEqDUwx6unqNKKWM302kjiThFgKeCUu6Ip6DA=; b=oX+SI+Cz6WCLTWF657Pmk3j+flNtKY1spuiu8nNhw0pMteQvC4djEq539CHHbgkZj5ZDJQ iohbNYy8Xp9KiYcMlj4+IBdSygEzzd9b/I6ndnx/rxuCTWok6vfOh7NS9APRgGzS0yrsan gwRXWjxRy7btfnOknX9Jd//9vlYb0mTqFKJC9OkdH2JTDAzb0CkawmkMdxaBpNHpRMLmsz IqNbMc/zpnRUrCRtHCzwJ5Ek5oc2jmNHCxmQtFnUMqDVp3X9Jrg2DVTFMXmzpe+g+dD3tM qByj6jiX6rhsSW6Q7ai3rjlAKIEk23WdFAi2ETOjUaa1Pwzs92UDspKRYBlejQ== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1611887307; a=rsa-sha256; cv=none; b=tQWwxiG0KaerLzC11mncruIvbLsMGRFI0Z1Sc8ynpDgZi792MNQMHIUDn3xa9xxRvoZt2Q HvzoXdP7jnRcv7OLYu0wcsKFA6hFmcc3d9KnqZQ09BfFUGxswreKu4fffAkVsn3u16sYmz 46navRg4Dp6gTKRaElTF6LGi6SMVW+ESnVrE5OqTjBAENXHTex4RL/lmcWJX+XmvJFTRnH uSNn8oYYWSgCOVZKkMMtXUuNREZI1Tw0I3MEFhC+OQW0MF12KyPw3TLOlhYASeZC/1aqUr 8GHES9C1wWVYLx8EoTuv8wsoOHhcZUhb1UK1u4JT4D7L4s/oqdjgXpycIPt+ww== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-BeenThere: freebsd-security-notifications@freebsd.org X-Mailman-Version: 2.1.34 List-Id: "Moderated Security Notifications \[moderated, low volume\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 29 Jan 2021 02:28:27 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-21:01.fsdisclosure Security Advisory The FreeBSD Project Topic: Uninitialized kernel stack leaks in several file systems Category: core Module: fs Announced: 2021-01-29 Credits: Syed Faraz Abrar Affects: All supported versions of FreeBSD. Corrected: 2021-01-06 14:58:41 UTC (stable/12, 12.2-STABLE) 2021-01-29 01:20:59 UTC (releng/12.2, 12.2-RELEASE-p3) 2021-01-29 01:06:09 UTC (releng/12.1, 12.1-RELEASE-p13) 2021-01-18 19:16:24 UTC (stable/11, 11.4-STABLE) 2021-01-29 00:20:09 UTC (releng/11.4, 11.4-RELEASE-p7) CVE Name: CVE-2020-25578, CVE-2020-25579 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit . I. Background The FreeBSD kernel exports file system directory entries to userspace using the generic "dirent" structure. Individual file systems implement VOP_READDIR to convert from the file system's internal directory entry layout to the generic form. dirent structures can be fetched from userspace using the getdirentries(2) system call. II. Problem Description Several file systems were not properly initializing the d_off field of the dirent structures returned by VOP_READDIR. In particular, tmpfs(5), smbfs(5), autofs(5) and mqueuefs(5) were failing to do so. As a result, eight uninitialized kernel stack bytes may be leaked to userspace by these file systems. This problem is not present in FreeBSD 11. Additionally, msdosfs(5) was failing to zero-fill a pair of padding fields in the dirent structure, resulting in a leak of three uninitialized bytes. III. Impact Kernel stack disclosures may leak sensitive information which could be used to compromise the security of the system. IV. Workaround Systems that do not have any of the affected file systems mounted are not affected. To trigger the leaks, an unprivileged user must have read access to a directory belonging to one of the mounted file systems. 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 i386 or amd64 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. [FreeBSD 12.x] # fetch https://security.FreeBSD.org/patches/SA-21:01/fsdisclosure.12.patch # fetch https://security.FreeBSD.org/patches/SA-21:01/fsdisclosure.12.patch.asc # gpg --verify fsdisclosure.12.patch.asc [FreeBSD 11.x] # fetch https://security.FreeBSD.org/patches/SA-21:01/fsdisclosure.11.patch # fetch https://security.FreeBSD.org/patches/SA-21:01/fsdisclosure.11.patch.asc # gpg --verify fsdisclosure.11.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 The following list contains the correction revision numbers for each affected branch. Branch/path Revision - ------------------------------------------------------------------------- stable/12/ r368969 releng/12.2/ r369175 releng/12.1/ r369165 stable/11/ r369047 releng/11.4/ r369156 - ------------------------------------------------------------------------- To see which files were modified by a particular revision, run the following command, replacing NNNNNN with the revision number, on a machine with Subversion installed: # 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----- iQKTBAEBCgB9FiEE/A6HiuWv54gCjWNV05eS9J6n5cIFAmATbjNfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEZD MEU4NzhBRTVBRkU3ODgwMjhENjM1NUQzOTc5MkY0OUVBN0U1QzIACgkQ05eS9J6n 5cJr9xAAkZz7B1xlb66yVYXmyIo8eFf2ZyYPXxoH9hIxx1N7PxY6l9MeU9xzcYrf tOYtsWyPxx+M+g0KZc2Q846zu3JySSBkGKT1Kx3aqMmfEqWMa6b2u/wM+rG/8NjR qzsU9SfnzgcBg0tu4m55en+7muuiO3JopCbQDdTSl0EgOFkMI6cuMXc2lm9BAEKj zpmKFbelSCIUjISpLASJzNKRfQV1UajpgyM/tWYSrlQwaejNkFOmBO1ylLBbigBo bqH5xCsttGGUC91QmsEdcrF3pSNuHEtW5nT8sbAlm6ue8bjY9AGhEB1fkV877KDG otN3sPe367uQA1AHWCq3qPseTgAV9pDW4Mctxi5VSz0P3tUzG+hqojtn+mDAvFob DnFWFJnMZC6mueunp555LXlgFzA79Vberjo15240kEvaf4B+PiCqVLr9baK/2KyW EEj3pn/ciGq/wBn5ZPoCDVk0hbcfVNxaXytHLDBZ7l/ti7ZC08SRyaPdhG8Tblbx ha/6+/viGbBHktuTU5Vz48cHja9RnDq0EUiTmplinUDhyouVyG4i2Yrn3anMnhd5 atULlylJlEPGq1WNH0A7yiKqQa6Bu4OFMdJ69YIYskcn3FC2vjz0LpRb+soFOIAH 2/o0UAMup9buG8CbPVLoCRPyPrEw0liaUJEUlxTVPDc3AJGM0xM= =gD1K -----END PGP SIGNATURE----- From owner-freebsd-security-notifications@freebsd.org Fri Jan 29 02:28:31 2021 Return-Path: Delivered-To: freebsd-security-notifications@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id AE22A4F6313 for ; Fri, 29 Jan 2021 02:28:31 +0000 (UTC) (envelope-from security-advisories@freebsd.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2610:1c1:1:6074::16:84]) (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 4DRh8v4Hkzz3N2L; Fri, 29 Jan 2021 02:28:31 +0000 (UTC) (envelope-from security-advisories@freebsd.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1611887311; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc; bh=2qR1rAmjXqjyz1CR0nsdYkPVc+P2t2AZHPC+DZrKX6A=; b=OY1S0XhqJRYEJl5IzCT1R9Ue5DM1eD2fjqbx2RUiuktTuJELYSH0WjUtD0YMxNHmAlngfP IliaJMBEpsGkZSBBEpffAexCbUvvIIp5D4MdZFaUeEJVzqNZtfRvngJ9r3ReKsZpgQiFdM /gO7PeREJL8O/vOkxZlNbiJPs5GkyEpuYCxPQ4m5F5CTcLW8qkZFqCOeCKvifcTly2t3Pb 5Yk9z3SrFkBKYbwMVaueDBX97w8zRoaNpqnDfIwEmkDWaMx0SJXyus7nhJSRmww+z2FR0Z /HfQFZvzsCp2Aq2JUzhq71OUPRdEw7ABcvxc2Zq7kGPXNrl2zyPvoAzBj4Epgw== Received: by freefall.freebsd.org (Postfix, from userid 945) id 72FB81DA5B; Fri, 29 Jan 2021 02:28:31 +0000 (UTC) From: FreeBSD Security Advisories To: FreeBSD Security Advisories Subject: FreeBSD Security Advisory FreeBSD-SA-21:02.xenoom Reply-To: freebsd-security@freebsd.org Precedence: bulk Message-Id: <20210129022831.72FB81DA5B@freefall.freebsd.org> Date: Fri, 29 Jan 2021 02:28:31 +0000 (UTC) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1611887311; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc; bh=2qR1rAmjXqjyz1CR0nsdYkPVc+P2t2AZHPC+DZrKX6A=; b=XwtmvraNW7gKdOLeV6sBtMI5WxtyRPaowtP+M+9fRLt47Y/l23tkv8wh25p044kDjNtt1B gyrJ5bdnWyKEMs7DxGty471yWD+CUHs4yOm9wJXHPMN5noeyrVrgzyZkx/Ogxa+RHWQ4Fo rOA7imGjcTjbT9Gc0XGbang15L1ahE8McFd6SS1Sao80BmDheczKaurSgBHd0wtlqHvGAi OFqxJr6N2fYFjrbFjdS16ePcanHY/OOI4Piy8jwcT65/XaDUa2jKvLPY+oCjeXRCJ6XVaN Aa6MDbXIfazxuFpmQiqT/ikGMndmYbr+0v1Y/TfG6Rf1shVXNhTOjIZBS/6HGQ== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1611887311; a=rsa-sha256; cv=none; b=yPmPLp06Dg1mgBRbIGy8EMvZemHgHgRStfWn2yBM4WEMP6y+gsefoEA02V9mLkS8WbjZS4 QcJcEVK+x3RuntPLoqncZofM7tkdxHJU9QObuFAiFgKjvsb6nspzXLmTKmm3hmxRg09jZA JzCBDZtX51faLZlmJbZj1M99kgLJ8mMJ85/867Q20lg5ZQ5IfL8sYM+8vGDQmuyaikfRG0 O+jOR02TuZsn3E00uH09movjfbG5zJLK0QOPUUBJbLmQNdYQ2XY33K4IVqUonM6iDLQMYE bXbudGVArKEATqkmjYAPCHZSjv5Uk44SraLERgKPAHy6QqHik0MCB8AaKD14Cg== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-BeenThere: freebsd-security-notifications@freebsd.org X-Mailman-Version: 2.1.34 List-Id: "Moderated Security Notifications \[moderated, low volume\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 29 Jan 2021 02:28:31 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-21:02.xenoom Security Advisory The FreeBSD Project Topic: Xen guests can triger backend Out Of Memory Category: contrib Module: Xen Announced: 2021-01-29 Credits: See Xen XSA-349 for details Affects: All supported versions of FreeBSD. Corrected: 2021-01-18 16:26:36 UTC (stable/12, 12.2-STABLE) 2021-01-29 01:21:04 UTC (releng/12.2, 12.2-RELEASE-p3) 2021-01-29 01:06:16 UTC (releng/12.1, 12.1-RELEASE-p13) 2021-01-21 09:14:50 UTC (stable/11, 11.4-STABLE) 2021-01-29 00:20:16 UTC (releng/11.4, 11.4-RELEASE-p7) CVE Name: CVE-2020-29568 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit . I. Background Xen is a type-1 hypervisor which supports FreeBSD as a Dom0 (or host domain). II. Problem Description Some OSes (including Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued. As the queue is unbound, a guest may be able to trigger a OOM in the backend. III. Impact A malicious guest can trigger an OOM in backends. IV. Workaround No workaround is available. FreeBSD systems not using Xen 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 i386 or amd64 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. [FreeBSD 12.x] # fetch https://security.FreeBSD.org/patches/SA-21:02/xenoom.12.patch # fetch https://security.FreeBSD.org/patches/SA-21:02/xenoom.12.patch.asc # gpg --verify xenoom.12.patch.asc [FreeBSD 11.x] # fetch https://security.FreeBSD.org/patches/SA-21:02/xenoom.11.patch # fetch https://security.FreeBSD.org/patches/SA-21:02/xenoom.11.patch.asc # gpg --verify xenoom.11.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 The following list contains the correction revision numbers for each affected branch. Branch/path Revision - ------------------------------------------------------------------------- stable/12/ r369038 releng/12.2/ r369177 releng/12.1/ r369167 stable/11/ r369072 releng/11.4/ r369158 - ------------------------------------------------------------------------- To see which files were modified by a particular revision, run the following command, replacing NNNNNN with the revision number, on a machine with Subversion installed: # 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----- iQKTBAEBCgB9FiEE/A6HiuWv54gCjWNV05eS9J6n5cIFAmATbjNfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEZD MEU4NzhBRTVBRkU3ODgwMjhENjM1NUQzOTc5MkY0OUVBN0U1QzIACgkQ05eS9J6n 5cJjmhAAloDel7j9rgyDK8Ozk5wPJQlUM/1Ddc4e5Q5vdzT29mNdWKfXjH5SEkGq Jx7w4fUronf8vsXn+bNXwn1u5PWGVTVX/Y4ljQ4JVwJ+NdxhxTuhNsbg7j2AZmdO PsfI+eFX1xq8wr3oDUl3GTHHcUI1Ol259tsOgJE7ISriazgbRk8/QVowMgS3jdHA OYJS8ADFWSO6d4TC2B5pvgC6NAiZjhgTDtjxzTnaWoUb0157JyhRh3Z2FQTBxoxU 3OQcTj7x7KBtbsiAI/Iq8Qu7JXyxtscVQfbXsk4Jt1uOskgsr8n9F+UGiP+GRIKb 0IsgNUlsPavINlNJjAwQWHtB8VJqH7LpG9t3/EMizUXjZAuRLxEjAFiHV8ju1U++ O9Xf9nB9auVrBn1WMYgH23bZ5D15W1HosEywifBw64R7CLDliD/HpJ3QaDEe3lCn pB0jgxuoE5RCbTppgUZM7tLUrtwgih+lOiZcLcA5xS9hQo8TWBLIJNBf5rRjJA6q /3vh5lOv/w8AHyBgA5395QIkkgw9dxy2o+LbtuVhdD/NbLX4GnNVMkQDsTF79PMT 8rl0Zn6Ldo0ypHAwPAVHektl+izuMftNQuQXSbEjkw/Xr1VCjIjllJET3K2e9X6z 4nPmq6t/0kuHWYSSDQAKdq/8Dosn3HLw1uQdst4ka7wf1Eon7Ow= =3L3L -----END PGP SIGNATURE-----