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Message-Id: <20200128203851.8D5601C20A@freefall.freebsd.org> Date: Tue, 28 Jan 2020 20:38:51 +0000 (UTC) From: FreeBSD Security Advisories <security-advisories@...ebsd.org> To: Bugtraq <bugtraq@...urityfocus.com> Subject: FreeBSD Security Advisory FreeBSD-SA-20:02.ipsec -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-20:02.ipsec Security Advisory The FreeBSD Project Topic: Missing IPsec anti-replay window check Category: core Module: kernel Announced: 2020-01-28 Credits: Jean-Francois HREN Affects: FreeBSD 12.0 only Corrected: 2020-01-28 18:56:46 UTC (releng/12.0, 12.0-RELEASE-p13) CVE Name: CVE-2019-5613 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:https://security.FreeBSD.org/>. I. Background IPsec is a suite of protocols providing data authentication, integrity, and confidentiality between two networked hosts. II. Problem Description A missing check means that an attacker can reinject an old packet and it will be accepted and processed by the IPsec endpoint. III. Impact The impact depends on the higher-level protocols in use over IPsec. For example, an attacker who can capture and inject packets could cause an action that was intentionally performed once to be repeated. IV. Workaround No workaround is available. Systems not using IPsec are not vulnerable. 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. # fetch https://security.FreeBSD.org/patches/SA-20:02/ipsec.patch # fetch https://security.FreeBSD.org/patches/SA-20:02/ipsec.patch.asc # gpg --verify ipsec.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 <URL:https://www.FreeBSD.org/handbook/kernelconfig.html> and reboot the system. VI. Correction details The following list contains the correction revision numbers for each affected branch. Branch/path Revision - ------------------------------------------------------------------------- releng/12.0/ r357218 - ------------------------------------------------------------------------- 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: <URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN> VII. References <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-5613> The latest revision of this advisory is available at <URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-20:02.ipsec.asc> -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEE/A6HiuWv54gCjWNV05eS9J6n5cIFAl4whdFfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEZD MEU4NzhBRTVBRkU3ODgwMjhENjM1NUQzOTc5MkY0OUVBN0U1QzIACgkQ05eS9J6n 5cIWbQ/9EvRm9/pFezk65B8NR9BJFYzSbFv8GxtxNjcFJ0KpG48s7XxBg9BWNKMs b7dtGTRlPKGUh0CRfhkCzxx10JZ0Aeu+UNNWQrt7r34pku1bUTrOAqW9nxIBq8zr tihvShWxWmMb9roeGRQIDpDoRCDs/Ps5eZ9NkTIRIPnGvidm8FTr8eQIHxSQJ/dX 9bnQO1KP3Fz1+ywKA/poMdfXwdrUhiaPaC9AQ704lMiz881Itsi93Xw9HceKar0E dnbPbXMTQ+mkdVe3U2KLVDIMs119XL3Nuel2y7ACNjH3Bvjeerfjn6rZfiseV5FR muH0I+HKVdkdgWrFRPPthzUTmZYaStgbgOymsclwCpUJkS/ITgJWTpx6V+0E+4n6 bocwue5xP9EtCKDoEp3RSf17f47nbHgA0oeR+1CU9bh2lU6h2lAxRhxkPcWrgBiJ HWSJ96UyF3S9Kfj7sbKBE/0wPQYRO2fs2PSfjvjmydyYlg0gcZ25tK3sm5xyvxoG pVCwMn3gFDchEWnxJaSrGg/xoQCCWM+KdVXkaBSdCEsqs8+o6bTXPrq8ZyU451aO 7qxLPBlw5XNZ87jUEOhT3PwH49H9sAl++4IHUUUvs5pcIigdTNplgVpRt2DdFDzg ardLO/Cyr1qAAMClC3jXx0I7uTViROt3x7lg2+2V7bF5SnL8VjU= =tFox -----END PGP SIGNATURE-----
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