175 lines
6.7 KiB
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175 lines
6.7 KiB
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=============================================================================
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FreeBSD-EN-15:06.file Errata Notice
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The FreeBSD Project
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Topic: Version and security update of file(1) and libmagic(3)
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Category: contrib
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Module: file
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Announced: 2015-06-09
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Affects: All supported versions of FreeBSD.
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Corrected: 2015-01-23 18:48:59 UTC (stable/10, 10.1-STABLE)
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2015-06-09 22:13:25 UTC (releng/10.1, 10.1-RELEASE-p11)
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2015-01-23 18:50:36 UTC (stable/9, 9.3-STABLE)
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2015-06-09 22:13:53 UTC (releng/9.3, 9.3-RELEASE-p15)
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2015-05-09 23:53:25 UTC (stable/8, 8.4-STABLE)
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2015-06-09 22:13:53 UTC (releng/8.4, 8.4-RELEASE-p29)
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CVE Name: CVE-2014-0207, CVE-2014-3478, CVE-2014-3479, CVE-2014-3480,
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CVE-2014-3487, CVE-2014-3538, CVE-2014-3587, CVE-2014-9620,
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CVE-2014-9621, CVE-2014-9653
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For general information regarding FreeBSD Errata Notices and Security
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Advisories, including descriptions of the fields above, security
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branches, and the following sections, please visit
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<URL:https://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 when handling complex
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files, for instance Portable Executable (PE) files and ELF files parsing
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code with libmagic(3) and in turn 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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System administrators who run file(1) and libmagic(3) against untrusted
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files, for instance when running with a mail server's mail scanner, are
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advised to configure the scanner in a way so that they do not call file(1)
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or libmagic(3) to conduct deep inspection of input files. Most of these
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scanners does not really need the in-depth analysis and the file type
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determined by libmagic is already sufficient.
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V. Solution
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This errata replaces the base system file(1) and libmagic(3) with the
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version 5.22.
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Perform one of the following:
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1) Upgrade your system to a supported FreeBSD stable or release / security
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branch (releng) dated after the correction date.
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2) To update your present 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 present 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 https://security.FreeBSD.org/patches/EN-15:06/file-10.1.patch
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# fetch https://security.FreeBSD.org/patches/EN-15:06/file-10.1.patch.asc
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# gpg --verify file-10.1.patch.asc
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[FreeBSD 9.3]
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# fetch https://security.FreeBSD.org/patches/EN-15:06/file-9.3.patch
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# fetch https://security.FreeBSD.org/patches/EN-15:06/file-9.3.patch.asc
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# gpg --verify file-9.3.patch.asc
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[FreeBSD 8.4]
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# fetch https://security.FreeBSD.org/patches/EN-15:06/file-8.4.patch
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# fetch https://security.FreeBSD.org/patches/EN-15:06/file-8.4.patch.asc
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# gpg --verify file-8.4.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:https://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/ r283135
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releng/8.4/ r284194
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stable/9/ r277593
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releng/9.3/ r284194
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stable/10/ r277592
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releng/10.1/ r284193
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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:https://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-2014-0207>
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3478>
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3479>
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3480>
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3487>
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3538>
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3587>
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9620>
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9621>
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9653>
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The latest revision of this Errata Notice is available at
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https://security.FreeBSD.org/advisories/FreeBSD-EN-15:06.file.asc
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