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)
101 lines
3.3 KiB
Text
101 lines
3.3 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA1
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=============================================================================
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FreeBSD-SA-06:05.80211 Security Advisory
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The FreeBSD Project
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Topic: IEEE 802.11 buffer overflow
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Category: core
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Module: net80211
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Announced: 2006-01-18
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Credits: Karl Janmar
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Affects: FreeBSD 6.0
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Corrected: 2006-01-18 09:03:15 UTC (RELENG_6, 6.0-STABLE)
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2006-01-18 09:03:36 UTC (RELENG_6_0, 6.0-RELEASE-p3)
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CVE Name: CVE-2006-0226
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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
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<URL:http://www.freebsd.org/security/>.
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I. Background
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The IEEE 802.11 network subsystem of FreeBSD implements the protocol
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negotiation used for wireless networking.
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II. Problem Description
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An integer overflow in the handling of corrupt IEEE 802.11 beacon or
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probe response frames when scanning for existing wireless networks can
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result in the frame overflowing a buffer.
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III. Impact
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An attacker able broadcast a carefully crafted beacon or probe response
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frame may be able to execute arbitrary code within the context of the
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FreeBSD kernel on any system scanning for wireless networks.
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IV. Workaround
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No workaround is available, but systems without IEEE 802.11 hardware or
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drivers loaded are not 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 6-STABLE or to the RELENG_6_0
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security branch dated after the 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 6.0 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 ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-06:05/80211.patch
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# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-06:05/80211.patch.asc
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b) Apply the patch.
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# cd /usr/src
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# patch < /path/to/patch
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c) Recompile your kernel as described in
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<URL:http://www.freebsd.org/handbook/kernelconfig.html> and reboot the
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system.
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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/sys/net80211/ieee80211_ioctl.c 1.25.2.9
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RELENG_6_0
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src/UPDATING 1.416.2.3.2.8
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src/sys/conf/newvers.sh 1.69.2.8.2.4
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src/sys/net80211/ieee80211_ioctl.c 1.25.2.3.2.1
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- -------------------------------------------------------------------------
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VII. References
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http://www.signedness.org/advisories/sps-0x1.txt
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0226
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The latest revision of this advisory is available at
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ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:05.80211.asc
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