04b880b25a
Fix OpenSSL multiple vulnerabilities. [13:03] Fix BIND remote denial of service. [13:04] Security: CVE-2013-0166, CVE-2013-0169 Security: FreeBSD-SA-13:03.openssl Security: CVE-2013-2266 Security: FreeBSD-SA-13:04.bind
112 lines
3.9 KiB
Text
112 lines
3.9 KiB
Text
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=============================================================================
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FreeBSD-SA-13:04.bind Security Advisory
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The FreeBSD Project
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Topic: BIND remote denial of service
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Category: contrib
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Module: bind
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Announced: 2013-04-02
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Credits: Matthew Horsfall of Dyn, Inc.
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Affects: FreeBSD 8.4-BETA1 and FreeBSD 9.x
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Corrected: 2013-03-28 05:35:46 UTC (stable/8, 8.4-BETA1)
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2013-03-28 05:39:45 UTC (stable/9, 9.1-STABLE)
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2013-04-02 17:34:42 UTC (releng/9.0, 9.0-RELEASE-p7)
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2013-04-02 17:34:42 UTC (releng/9.1, 9.1-RELEASE-p2)
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CVE Name: CVE-2013-2266
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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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BIND 9 is an implementation of the Domain Name System (DNS) protocols.
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The named(8) daemon is an Internet Domain Name Server. The libdns
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library is a library of DNS protocol support functions.
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II. Problem Description
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A flaw in a library used by BIND allows an attacker to deliberately
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cause excessive memory consumption by the named(8) process. This
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affects both recursive and authoritative servers.
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III. Impact
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A remote attacker can cause the named(8) daemon to consume all available
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memory and crash, resulting in a denial of service. Applications linked
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with the libdns library, for instance dig(1), may also be affected.
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IV. Workaround
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No workaround is available, but systems not running named(8) service
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and not using base system DNS utilities are not affected.
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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-13:04/bind.patch
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# fetch http://security.FreeBSD.org/patches/SA-13:04/bind.patch.asc
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# gpg --verify bind.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 named daemon, 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 revision numbers of each file that was
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corrected in FreeBSD.
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Branch/path Revision
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- -------------------------------------------------------------------------
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stable/8/ r248807
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stable/9/ r248808
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releng/9.0/ r249029
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releng/9.1/ r249029
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- -------------------------------------------------------------------------
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VII. References
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https://kb.isc.org/article/AA-00871
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-2266
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The latest revision of this advisory is available at
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http://security.FreeBSD.org/advisories/FreeBSD-SA-13:04.bind.asc
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