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. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBU6ozQRLndAQH1ShLAQKicQ//UYfwevWgEjUgK5CoPfv5UereVr48e++d P93TGSiD565Vk0aaqx7So6gqQpdNM8lH/g9yp+K6KJwxAZOyrE5dyNe5vucmTnzd rktlcfSAd/8JrLTO398HHIlPzNKQEvg6R30I4js1Kpx825stHAcT1/n0SgPOx1Ip uXEHujQxYu/7o+Iby7tGGEBTQuT00caOT4rDdy18iGuv9Dc6DIg7josP3AmLFD27 9NvmgijkLTCAg1LssR6eMQSa5fxqqlWzCtMZqRKJ+pLqIvgO2qBD+f7N5zsVeipD blzsa/HCo01qEnzLAbjYHyKRuCaZOZNA2F39223fF7S5x265JnLIk/pQQMJwmKLN XyJ3PhK38MRaQSv+Sz9acsojR2qZpmVRKX4hQ2Bv2m292rj7kKk37banJrpge8DH XfL95MaMoL73uvymu5+Cs8iqzEkBrWOpraVgjoav5Xlsi8GmxBbFe8M18nTzs0JR n2bUG6bGIIRY5zRaG8bZ2JBNtD9EzCJGQHCB1GBPtcW/UAQ/amnFek4DaxIk8xKz dv9z3X52V+VFAr8IrJrb5X7hv4pOZHztkGFv25JFqg1Fh5WWHzMwAxAwF9mgMWlB nQGN+SA8zccr/GpIFUw0iNEoptA1j33HyJgIeU7Q2+TqG+HMkaqk+5iPCp0tILcR /U0vMcJaidE= =z+5x -----END PGP SIGNATURE-----