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)
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3 KiB
Text
94 lines
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Text
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Hash: SHA1
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=============================================================================
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FreeBSD-SA-06:24.libarchive Security Advisory
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The FreeBSD Project
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Topic: Infinite loop in corrupt archives handling in libarchive(3)
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Category: core
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Module: libarchive
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Announced: 2006-11-08
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Credits: Rink Springer
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Affects: FreeBSD 6-STABLE after 2006-09-05 05:23:51 UTC
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Corrected: 2006-11-08 14:05:40 UTC (RELENG_6, 6.2-RC1)
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CVE Name: CVE-2006-5680
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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 libarchive library provides a flexible interface for reading and
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writing streaming archive files such as tar and cpio, and has been the
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basis for FreeBSD's implementation of the tar(1) utility since FreeBSD 5.3.
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II. Problem Description
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If the end of an archive is reached while attempting to "skip" past a
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region of an archive, libarchive will enter an infinite loop wherein it
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repeatedly attempts (and fails) to read further data.
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III. Impact
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An attacker able to cause a system to extract (via "tar -x" or another
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application which uses libarchive) or list the contents (via "tar -t" or
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another libarchive-using application) of an archive provided by the
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attacker can cause libarchive to enter an infinite loop and use all
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available CPU time.
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IV. Workaround
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No workaround is available.
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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 6-STABLE dated after the correction
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date.
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2) To patch your present system:
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The following patches have been verified to apply to affected 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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# fetch http://security.FreeBSD.org/patches/SA-06:24/libarchive.patch
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# fetch http://security.FreeBSD.org/patches/SA-06:24/libarchive.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/libarchive
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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_6
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src/lib/libarchive/archive_read_support_compression_none.c 1.6.2.2
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- -------------------------------------------------------------------------
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VII. References
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5680
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The latest revision of this advisory is available at
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http://security.FreeBSD.org/advisories/FreeBSD-SA-06:24.libarchive.asc
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