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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.2350 BIND remote denial of service vulnerability 11 December 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: bind Publisher: FreeBSD Operating System: FreeBSD Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2014-8500 Reference: ESB-2014.2324 ESB-2014.2323 Original Bulletin: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-14:29.bind.asc - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-14:29.bind Security Advisory The FreeBSD Project Topic: BIND remote denial of service vulnerability Category: contrib Module: bind Announced: 2014-12-10 Credits: ISC Affects: FreeBSD 8.4, 9.1, 9.2 and 9.3. Corrected: 2014-12-10 08:31:41 UTC (stable/9, 9.3-STABLE) 2014-12-10 08:36:40 UTC (releng/9.3, 9.3-RELEASE-p6) 2014-12-10 08:36:40 UTC (releng/9.2, 9.2-RELEASE-p16) 2014-12-10 08:36:40 UTC (releng/9.1, 9.1-RELEASE-p23) 2014-12-10 08:31:41 UTC (stable/8, 8.4-STABLE) 2014-12-10 08:36:40 UTC (releng/8.4, 8.4-RELEASE-p20) CVE Name: CVE-2014-8500 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:http://security.FreeBSD.org/>. I. Background BIND 9 is an implementation of the Domain Name System (DNS) protocols. The named(8) daemon is an Internet Domain Name Server. II. Problem Description By causing queries to be made against a maliciously-constructed zone or against a malicious DNS server, an attacker who is able to cause specific queries to be sent to a nameserver can cause named(8) to crash, leading to a denial of service. All recursive BIND DNS servers are vulnerable to this. Authoritative servers are only vulnerable if the attacker is able to control a delegation traversed by the authoritative server in order to serve the zone. III. Impact An attacker who can cause specific queries to be sent to a nameserver could cause named(8) to crash, resulting in a denial of service. IV. Workaround No workaround is available, but hosts not running named(8) are not vulnerable. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to a supported FreeBSD stable or release / security branch (releng) dated after the correction date. 2) To update your vulnerable system via a binary patch: Systems running a RELEASE version of FreeBSD on the i386 or amd64 platforms can be updated via the freebsd-update(8) utility: # freebsd-update fetch # freebsd-update install 3) To update your vulnerable system via a source code patch: The following patches have been verified to apply to the applicable FreeBSD release branches. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. [FreeBSD 9.3-RELEASE and 9.3-STABLE] # fetch http://security.FreeBSD.org/patches/SA-14:29/bind995.patch # fetch http://security.FreeBSD.org/patches/SA-14:29/bind995.patch.asc # gpg --verify bind995.patch.asc [FreeBSD 9.2-RELEASE] # fetch http://security.FreeBSD.org/patches/SA-14:29/bind984.patch # fetch http://security.FreeBSD.org/patches/SA-14:29/bind984.patch.asc # gpg --verify bind984.patch.asc [FreeBSD 9.1-RELEASE] # fetch http://security.FreeBSD.org/patches/SA-14:29/bind983.patch # fetch http://security.FreeBSD.org/patches/SA-14:29/bind983.patch.asc # gpg --verify bind983.patch.asc [FreeBSD 8.4-STABLE] # fetch http://security.FreeBSD.org/patches/SA-14:29/bind987.patch # fetch http://security.FreeBSD.org/patches/SA-14:29/bind987.patch.asc # gpg --verify bind987.patch.asc [FreeBSD 8.4-RELEASE] # fetch http://security.FreeBSD.org/patches/SA-14:29/bind984.patch # fetch http://security.FreeBSD.org/patches/SA-14:29/bind984.patch.asc # gpg --verify bind984.patch.asc b) Apply the patch. Execute the following commands as root: # cd /usr/src # patch < /path/to/patch c) Recompile the operating system using buildworld and installworld as described in <URL:http://www.FreeBSD.org/handbook/makeworld.html>. Restart the applicable daemons, or reboot the system. VI. Correction details The following list contains the correction revision numbers for each affected branch. Branch/path Revision - - ------------------------------------------------------------------------- stable/8/ r275669 releng/8.4/ r275672 stable/9/ r275669 releng/9.1/ r275672 releng/9.2/ r275672 releng/9.3/ r275672 - - ------------------------------------------------------------------------- To see which files were modified by a particular revision, run the following command, replacing NNNNNN with the revision number, on a machine with Subversion installed: # svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base Or visit the following URL, replacing NNNNNN with the revision number: <URL:http://svnweb.freebsd.org/base?view=revision&revision=NNNNNN> VII. References <URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8500> The latest revision of this advisory is available at <URL:http://security.FreeBSD.org/advisories/FreeBSD-SA-14:29.bind.asc> - -----BEGIN PGP SIGNATURE----- iQIcBAEBCgAGBQJUiA11AAoJEO1n7NZdz2rn7kgP/RWw0Q9dx8/xS+NSypV3Hfqr 6D4Zh8LGsrKuWMGD29MYrFle2Ze5gUfjOFfaqonD2P5vyrCfnyVUhGiIRUKcFn/z dF6XwWKoZHRRHxNL7d71ZRwG3o4gEJP0SWFbfIVUg0YCDdwpChASyHJkXR5rgrTB 6MFDdeNGq+NzQzESmJJyLT/hgWZB0p/g5tLnez+XNxxk4oGywJlNACEq9SfD618Q 86Pl7oFJjaKrAtb7kzI2tYG+UvUHdQriRwo9C87fnSH4TNf2G1VwVoV0Lip45w4I MwJ8j4U3Vqr8cepqc6HSZauIA7N3N1Key7qzcnEP56iIfM1yIg+k7FTeaGM7tw45 lxlrxgLDBpFt+F24cnROagNFZ8o2iWsnaH9ZhEkV6Qabu7eU/XjwKwY9evqqPgeP bCFZeFCxl4DSNTgkLmP+GjXoRxXQ2NokboU7o+KnZGPnxduDK9RG4yx0IvQc3uyv ad+zW4luYGuuIwVXiHif8y7SnOrp4LiVIX04isavaBVSndWC4VenlajoH8IvYxIW P/Bc8J0qxPmEJzZmutzLNQEDEHnxz3o9s/6C7FSASRkMMJ7QXvq0bIdVpkubh0bE PqJVu6WN2KD6tKjuZq4P/WVrRedsRG+qDYb819guIok2kGa6A4tgQ/DAvuZur+do K3JRKm1SZmozOqV/SVmy =uNWP - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBVIjfcBLndAQH1ShLAQIvGA//bdSNQue3GwkH4lagcrPeiKyk558vzfSy tLdl9aHTNf6Jdu/P08zll+WBvcjoE6E5bNyy1aj3bHHQT9yzcSgwgCWlfLPow8zi Fal+7zMssuii47StQbucOQenQFqmrmGPe78nUf9vTZiXfn9ay9bBdH912lPq2P+q 5Fdbg1+oc5sY52HGNcxiEA2uhpxQmLtUOAWyOSHdW85/MYESFvUh444ZkMzbXM2I KXipJD70hsJN950aEt0GvQfDH3Fb/qzQCYgzCLR07+LknUryo31Bloyr2SqlvIPs UEa04dRGbvYAQ1p8851JdXIgJbP6jFuvt+I/YjgmP9Is7qEWjNLykZMI022UYRP4 jpd953VMSnVBXffQkJ1QezA45vOplMWyJbTJA4kKDByaer9edjUi7CZIVjMi/svZ QpoP1Oam+dxKMrAL6ESHzWz6LdjtwUPekTYX5i4SCW1NvIvkmc9JuoTQdsH3fJrw IneTBG4mJ6T01+U87/eOdJHty0T180x76i3AvD3l1l87OFPt3L/z03MjtySdX3EB SkebT/rYwMZpb54UVSbAkm1puLQuHUmAhDyr++po/Y2iJwZjrZgpT+96qQkZgWL+ zIXQiFHjk0aTq5GG+CGMwhtMJ8dYhvTJCN1XyMHjVTBNKAbagm/1TiixI1PXd2o8 OZr23wGaYkI= =UkEt -----END PGP SIGNATURE-----