157 lines
6.1 KiB
Text
157 lines
6.1 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA512
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=============================================================================
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FreeBSD-SA-14:28.file Security Advisory
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The FreeBSD Project
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Topic: Multiple vulnerabilities in file(1) and libmagic(3)
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Category: contrib
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Module: file
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Announced: 2014-12-10
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Affects: All supported versions of FreeBSD.
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Credits: Thomas Jarosch of Intra2net AG
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Corrected: 2014-12-10 08:26:53 UTC (stable/10, 10.1-STABLE)
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2014-12-10 08:35:55 UTC (releng/10.1, 10.1-RELEASE-p1)
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2014-12-10 08:36:07 UTC (releng/10.0, 10.0-RELEASE-p13)
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2014-12-10 08:31:41 UTC (stable/9, 9.3-STABLE)
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2014-12-10 08:36:40 UTC (releng/9.3, 9.3-RELEASE-p6)
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2014-12-10 08:36:40 UTC (releng/9.2, 9.2-RELEASE-p16)
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2014-12-10 08:36:40 UTC (releng/9.1, 9.1-RELEASE-p23)
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2014-12-10 08:31:41 UTC (stable/8, 8.4-STABLE)
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2014-12-10 08:36:40 UTC (releng/8.4, 8.4-RELEASE-p20)
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CVE Name: CVE-2014-3710, CVE-2014-8116, CVE-2014-8117
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For general information regarding FreeBSD Security Advisories,
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including descriptions of the fields above, security branches, and the
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following sections, please visit <URL:http://security.FreeBSD.org/>.
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I. Background
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The file(1) utility attempts to classify file system objects based on
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filesystem, magic number and language tests.
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The libmagic(3) library provides most of the functionality of file(1)
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and may be used by other applications.
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II. Problem Description
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There are a number of denial of service issues in the ELF parser used
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by file(1).
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III. Impact
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An attacker who can cause file(1) or any other applications using the
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libmagic(3) library to be run on a maliciously constructed input can
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cause the application to crash or consume excessive CPU resources,
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resulting in a denial-of-service.
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IV. Workaround
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No workaround is available, but systems where file(1) and other
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libmagic(3)-using applications are never run on untrusted input are not
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vulnerable.
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V. Solution
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Perform one of the following:
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1) Upgrade your vulnerable system to a supported FreeBSD stable or
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release / security branch (releng) dated after the correction date.
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2) To update your vulnerable system via a binary patch:
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Systems running a RELEASE version of FreeBSD on the i386 or amd64
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platforms can be updated via the freebsd-update(8) utility:
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# freebsd-update fetch
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# freebsd-update install
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3) To update your vulnerable system via a source code patch:
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The following patches have been verified to apply to the applicable
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FreeBSD release branches.
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a) Download the relevant patch from the location below, and verify the
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detached PGP signature using your PGP utility.
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[FreeBSD 10.1]
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# fetch http://security.FreeBSD.org/patches/SA-14:28/file-12.patch
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# fetch http://security.FreeBSD.org/patches/SA-14:28/file-12.patch.asc
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# gpg --verify file-12.patch.asc
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[FreeBSD 9.1, 9.2, 9.3 and 10.0]
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# fetch http://security.FreeBSD.org/patches/SA-14:28/file-8.patch
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# fetch http://security.FreeBSD.org/patches/SA-14:28/file-8.patch.asc
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# gpg --verify file-8.patch.asc
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[FreeBSD 8.4]
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# fetch http://security.FreeBSD.org/patches/SA-14:28/file-7.patch
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# fetch http://security.FreeBSD.org/patches/SA-14:28/file-7.patch.asc
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# gpg --verify file-7.patch.asc
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b) Apply the patch. Execute the following commands as root:
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# cd /usr/src
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# patch < /path/to/patch
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c) Recompile the operating system using buildworld and installworld as
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described in <URL:http://www.FreeBSD.org/handbook/makeworld.html>.
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Restart all deamons using the library, or reboot the system.
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VI. Correction details
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The following list contains the correction revision numbers for each
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affected branch.
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Branch/path Revision
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- -------------------------------------------------------------------------
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stable/8/ r275669
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releng/8.4/ r275672
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stable/9/ r275669
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releng/9.1/ r275672
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releng/9.2/ r275672
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releng/9.3/ r275672
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stable/10/ r275668
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releng/10.0/ r275671
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releng/10.1/ r275670
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- -------------------------------------------------------------------------
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To see which files were modified by a particular revision, run the
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following command, replacing NNNNNN with the revision number, on a
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machine with Subversion installed:
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# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base
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Or visit the following URL, replacing NNNNNN with the revision number:
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<URL:http://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>
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VII. References
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3710>
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8116>
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8117>
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The latest revision of this advisory is available at
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<URL:http://security.FreeBSD.org/advisories/FreeBSD-SA-14:28.file.asc>
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