25 June 2014
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.1032 Multiple vulnerabilities in file(1) and libmagic(3) 25 June 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: file Publisher: FreeBSD Operating System: FreeBSD Impact/Access: Denial of Service -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2014-2270 CVE-2014-1943 CVE-2013-7345 CVE-2012-1571 Reference: ESB-2014.0859 ESB-2014.0326.2 ESB-2014.0265 ESB-2014.0199 ESB-2012.0233.3 Original Bulletin: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-14:16.file.asc - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-14:16.file Security Advisory The FreeBSD Project Topic: Multiple vulnerabilities in file(1) and libmagic(3) Category: contrib Module: file Announced: 2014-06-24 Affects: All supported versions of FreeBSD. Corrected: 2014-06-24 19:04:55 UTC (stable/10, 10.0-STABLE) 2014-06-24 19:05:08 UTC (releng/10.0, 10.0-RELEASE-p6) 2014-06-24 19:04:55 UTC (stable/9, 9.3-PRERELEASE) 2014-06-24 19:05:19 UTC (releng/9.3, 9.3-RC2) 2014-06-24 19:05:36 UTC (releng/9.2, 9.2-RELEASE-p9) 2014-06-24 19:05:36 UTC (releng/9.1, 9.1-RELEASE-p16) 2014-06-24 19:04:55 UTC (stable/8, 8.4-STABLE) 2014-06-24 19:05:47 UTC (releng/8.4, 8.4-RELEASE-p13) CVE Name: CVE-2012-1571, CVE-2013-7345, CVE-2014-1943, CVE-2014-2270 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:http://security.FreeBSD.org/>. I. Background The file(1) utility attempts to classify file system objects based on filesystem, magic number and language tests. The libmagic(3) library provides most of the functionality of file(1) and may be used by other applications. II. Problem Description A specifically crafted Composite Document File (CDF) file can trigger an out-of-bounds read or an invalid pointer dereference. [CVE-2012-1571] A flaw in regular expression in the awk script detector makes use of multiple wildcards with unlimited repetitions. [CVE-2013-7345] A malicious input file could trigger infinite recursion in libmagic(3). [CVE-2014-1943] A specifically crafted Portable Executable (PE) can trigger out-of-bounds read. [CVE-2014-2270] III. Impact An attacker who can cause file(1) or any other applications using the libmagic(3) library to be run on a maliciously constructed input can the application to crash or consume excessive CPU resources, resulting in a denial-of-service. IV. Workaround No workaround is available, but systems where file(1) and other libmagic(3)-using applications are never run on untrusted input are not vulnerable. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to a supported FreeBSD stable or release / security branch (releng) dated after the correction date. 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 9.1, 9.2, 9.3, 10.0] # fetch http://security.FreeBSD.org/patches/SA-14:16/file.patch # fetch http://security.FreeBSD.org/patches/SA-14:16/file.patch.asc # gpg --verify file.patch.asc [FreeBSD 8.4] # fetch http://security.FreeBSD.org/patches/SA-14:16/file-8.4.patch # fetch http://security.FreeBSD.org/patches/SA-14:16/file-8.4.patch.asc # gpg --verify file.patch.asc b) Apply the patch. Execute the following commands as root: # cd /usr/src # patch < /path/to/patch c) Recompile the operating system using buildworld and installworld as described in <URL:http://www.FreeBSD.org/handbook/makeworld.html>. Restart all deamons using the library, or reboot the system. 3) 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 VI. Correction details The following list contains the correction revision numbers for each affected branch. Branch/path Revision - - ------------------------------------------------------------------------- stable/8/ r267828 releng/8.4/ r267832 stable/9/ r267828 releng/9.1/ r267831 releng/9.2/ r267831 releng/9.3/ r267830 stable/10/ r267828 releng/10.0/ r267829 - - ------------------------------------------------------------------------- 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:http://svnweb.freebsd.org/base?view=revision&revision=NNNNNN> VII. References <URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-1571> <URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-7345> <URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1943> <URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2270> The latest revision of this advisory is available at <URL:http://security.FreeBSD.org/advisories/FreeBSD-SA-14:16.file.asc> - -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCgAGBQJTqc+KAAoJEO1n7NZdz2rnaLsP/jwrr5b1qZ9tObnN3FXwzEjD jNHa3AJKHXgrYGzF8yNrZElhE48f02sr9dEXqIw/E5eElcVhi38RBEkwblE8Nj2H M5bzEwVS7kWPcAl1vBno1rFTHutUTOSSopBGgwlNAlWSFnr1iFIIU9dQ6kcGCnBj LvMx5kTSyZ707kArRrFjrDeYlPLSE/vSBOC00TqReS+3Q9By1IH5kUWesDWr+3Gk lvW/JzSTcyOicrGR6vRHiLn9+NKojd6pV3hqV/uxuth1OxRtiGPeodL6CyvkipMo rKjTgXEY2KluBGV9ff+rbeARLfUh2PDJ9Z5BfF7O8ZyMZpKkcw6MFRRfJ0xgtUZK vpF0u8NVMIZhHLSJ9q1Roij2POxeOETNXG2bGKtVu8pqhJ14DvMfPgamsQLhzKRX vBN1Gw+3RctJrQpF9HvYFOsKlfzcWyka82lw5GSsDYGH2TamU00CTQmx/5PW+WVo xV3C17Wj8AkmRYWeC4IzkTiZ8avVOZ+TMyJKRhL6EGBT3ramu8BFdV8oZOcHHpR/ rAI6eZcFtNuwKuvfqHZmh84GicHDkMHXy6OiyCYUW9uNdWl7nUPMMxp/zEA6gtay ozVedGIIrhYkfQAJRcRAcnEBYqcBVkCD/rKXJtdALl3RDQrediRaz0nWE2bJ/qs3 bHjS6vu9VS/3z0+pEYri =5Ihe - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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