3571e53040
patches for easier mirroring, to eliminate a special copy, to make www.freebsd.org/security a full copy of security.freebsd.org and be eventually be the same. For now files are just sitting there. The symlinks are missing. Discussed on: www (repository location) Discussed with: simon (so)
133 lines
5.1 KiB
Text
133 lines
5.1 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA1
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=============================================================================
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FreeBSD-SA-07:04.file Security Advisory
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The FreeBSD Project
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Topic: Heap overflow in file(1)
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Category: contrib
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Module: file
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Announced: 2007-05-23
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Affects: All FreeBSD releases.
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Corrected: 2007-05-23 16:12:51 UTC (RELENG_6, 6.2-STABLE)
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2007-05-23 16:13:07 UTC (RELENG_6_2, 6.2-RELEASE-p5)
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2007-05-23 16:13:20 UTC (RELENG_6_1, 6.1-RELEASE-p17)
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2007-05-23 16:12:10 UTC (RELENG_5, 5.5-STABLE)
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2007-05-23 16:12:35 UTC (RELENG_5_5, 5.5-RELEASE-p13)
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CVE Name: CVE-2007-1536
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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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When writing data into a buffer in the file_printf function, the length
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of the unused portion of the buffer is not correctly tracked, resulting
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in a buffer overflow when processing certain files.
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III. Impact
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An attacker who can cause file(1) to be run on a maliciously constructed
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input can cause file(1) to crash. It may be possible for such an attacker
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to execute arbitrary code with the privileges of the user running file(1).
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The above also applies to any other applications using the libmagic(3)
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library.
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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 5-STABLE, or 6-STABLE, or to the
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RELENG_6_2, RELENG_6_1, or RELENG_5_5 security branch dated after the
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correction date.
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2) To patch your present system:
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The following patches have been verified to apply to FreeBSD 5.5, 6.1,
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and 6.2 systems.
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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 5.5]
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# fetch http://security.FreeBSD.org/patches/SA-07:04/file5.patch
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# fetch http://security.FreeBSD.org/patches/SA-07:04/file5.patch.asc
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[FreeBSD 6.1 and 6.2]
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# fetch http://security.FreeBSD.org/patches/SA-07:04/file6.patch
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# fetch http://security.FreeBSD.org/patches/SA-07:04/file6.patch.asc
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b) 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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# cd /usr/src/lib/libmagic
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# make obj && make depend && make && make install
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VI. Correction details
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The following list contains the revision numbers of each file that was
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corrected in FreeBSD.
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Branch Revision
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Path
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- -------------------------------------------------------------------------
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RELENG_5
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src/contrib/file/file.h 1.1.1.7.2.1
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src/contrib/file/funcs.c 1.1.1.1.2.1
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src/contrib/file/magic.c 1.1.1.1.2.1
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RELENG_5_5
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src/UPDATING 1.342.2.35.2.13
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src/sys/conf/newvers.sh 1.62.2.21.2.15
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src/contrib/file/file.h 1.1.1.7.8.1
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src/contrib/file/funcs.c 1.1.1.1.8.1
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src/contrib/file/magic.c 1.1.1.1.8.1
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RELENG_6
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src/contrib/file/file.h 1.1.1.8.2.1
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src/contrib/file/funcs.c 1.1.1.2.2.1
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src/contrib/file/magic.c 1.1.1.2.2.1
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RELENG_6_2
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src/UPDATING 1.416.2.29.2.8
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src/sys/conf/newvers.sh 1.69.2.13.2.8
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src/contrib/file/file.h 1.1.1.8.8.1
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src/contrib/file/funcs.c 1.1.1.2.8.1
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src/contrib/file/magic.c 1.1.1.2.8.1
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RELENG_6_1
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src/UPDATING 1.416.2.22.2.19
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src/sys/conf/newvers.sh 1.69.2.11.2.19
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src/contrib/file/file.h 1.1.1.8.6.1
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src/contrib/file/funcs.c 1.1.1.2.6.1
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src/contrib/file/magic.c 1.1.1.2.6.1
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- -------------------------------------------------------------------------
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VII. References
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1536
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The latest revision of this advisory is available at
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http://security.FreeBSD.org/advisories/FreeBSD-SA-07:04.file.asc
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