139 lines
5.5 KiB
Text
139 lines
5.5 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA512
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=============================================================================
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FreeBSD-SA-14:01.bsnmpd Security Advisory
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The FreeBSD Project
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Topic: bsnmpd remote denial of service vulnerability
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Category: contrib
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Module: bsnmp
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Announced: 2014-01-14
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Credits: Dirk Meyer
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Affects: All supported versions of FreeBSD.
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Corrected: 2014-01-14 19:02:14 UTC (stable/10, 10.0-PRERELEASE)
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2014-01-14 19:10:38 UTC (releng/10.0, 10.0-RELEASE)
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2014-01-14 19:10:38 UTC (releng/10.0, 10.0-RC5-p1)
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2014-01-14 19:10:38 UTC (releng/10.0, 10.0-RC4-p1)
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2014-01-14 19:10:38 UTC (releng/10.0, 10.0-RC3-p1)
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2014-01-14 19:10:38 UTC (releng/10.0, 10.0-RC2-p1)
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2014-01-14 19:10:38 UTC (releng/10.0, 10.0-RC1-p1)
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2014-01-14 19:17:20 UTC (stable/9, 9.2-STABLE)
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2014-01-14 19:42:28 UTC (releng/9.2, 9.2-RELEASE-p3)
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2014-01-14 19:42:28 UTC (releng/9.1, 9.1-RELEASE-p10)
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2014-01-14 19:17:20 UTC (stable/8, 8.4-STABLE)
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2014-01-14 19:42:28 UTC (releng/8.4, 8.4-RELEASE-p7)
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2014-01-14 19:42:28 UTC (releng/8.3, 8.3-RELEASE-p14)
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CVE Name: CVE-2014-1452
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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 bsnmpd is a simple and extensible SNMP daemon serves the Internet SNMP
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(Simple Network Management Protocol).
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II. Problem Description
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The bsnmpd(8) daemon is prone to a stack-based buffer-overflow when it
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has received a specifically crafted GETBULK PDU request.
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III. Impact
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This issue could be exploited to execute arbitrary code in the context of
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the service daemon, or crash the service daemon, causing a denial-of-service.
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IV. Workaround
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No workaround is available, but systems not running bsnmpd(8) 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 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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# fetch http://security.FreeBSD.org/patches/SA-14:01/bsnmpd.patch
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# fetch http://security.FreeBSD.org/patches/SA-14:01/bsnmpd.patch.asc
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# gpg --verify bsnmpd.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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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 the bsnmpd(8) daemons, or reboot the system.
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3) 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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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/ r260642
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releng/8.3/ r260647
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releng/8.4/ r260647
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stable/9/ r260642
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releng/9.1/ r260647
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releng/9.2/ r260647
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stable/10/ r260638
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releng/10.0/ r260640
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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-2014-1452>
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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-14:01.bsnmpd.asc>
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