-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ============================================================================= FreeBSD-SA-03:19.bind Security Advisory The FreeBSD Project Topic: bind8 negative cache poison attack Category: contrib Module: contrib_bind Announced: 2003-11-28 Credits: Internet Software Consortium Affects: FreeBSD versions through 4.9-RELEASE and 5.1-RELEASE 4-STABLE prior to the correction date Corrected: 2003-11-28 22:13:47 UTC (RELENG_4, 4.9-STABLE) 2003-11-27 00:54:53 UTC (RELENG_5_1, 5.1-RELEASE-p11) 2003-11-27 16:54:01 UTC (RELENG_5_0, 5.0-RELEASE-p19) 2003-11-27 00:56:06 UTC (RELENG_4_9, 4.9-RELEASE-p1) 2003-11-27 16:34:22 UTC (RELENG_4_8, 4.8-RELEASE-p14) 2003-11-27 16:35:06 UTC (RELENG_4_7, 4.7-RELEASE-p24) 2003-11-27 16:37:00 UTC (RELENG_4_6, 4.6.2-RELEASE-p27) 2003-11-27 16:38:36 UTC (RELENG_4_5, 4.5-RELEASE-p37) 2003-11-27 16:40:03 UTC (RELENG_4_4, 4.4-RELEASE-p47) CVE Name: CAN-2003-0914 FreeBSD only: NO For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:http://www.freebsd.org/security/>. I. Background BIND 8 is an implementation of the Domain Name System (DNS) protocols. The named(8) daemon is the Internet domain name server. II. Problem Description A programming error in BIND 8 named can result in a DNS message being incorrectly cached as a negative response. III. Impact An attacker may arrange for malicious DNS messages to be delivered to a target name server, and cause that name server to cache a negative response for some target domain name. The name server would thereafter respond negatively to legitimate queries for that domain name, resulting in a denial-of-service for applications that require DNS. Almost all Internet applications require DNS, such as the Web, email, and chat networks. IV. Workaround No workaround is known. V. Solution Do one of the following: 1) Upgrade your vulnerable system to 4.9-STABLE; or to the RELENG_5_1, RELENG_4_9, RELENG_4_8, or RELENG_4_7 security branch dated after the correction date. 2) To patch your present system: a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. [FreeBSD 4.9 and -STABLE systems] # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:19/bind-836.patch # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:19/bind-836.patch.asc [FreeBSD 4.8 and 5.1 systems] # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:19/bind-834.patch # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:19/bind-834.patch.asc [FreeBSD 4.4, 4.5, 4.6, 4.7, and 5.0 systems] # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:19/bind-833.patch # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:19/bind-833.patch.asc b) Execute the following commands as root: # cd /usr/src # patch < /path/to/patch # cd /usr/src/lib/libbind # make obj && make depend && make # cd /usr/src/lib/libisc # make obj && make depend && make # cd /usr/src/usr.sbin/named # make obj && make depend && make && make install # cd /usr/src/libexec/named-xfer # make obj && make depend && make && make install After upgrading or patching your system, you must restart named. Execute the following command as root: # ndc restart VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. Branch Revision Path - ------------------------------------------------------------------------- RELENG_4 src/contrib/bind/CHANGES 1.1.1.7.2.11 src/contrib/bind/README 1.1.1.7.2.9 src/contrib/bind/Version 1.1.1.3.2.10 src/contrib/bind/bin/named-xfer/named-xfer.c 1.3.2.8 src/contrib/bind/bin/named/Makefile 1.3.2.6 src/contrib/bind/bin/named/ns_init.c 1.1.1.2.2.6 src/contrib/bind/bin/named/ns_resp.c 1.1.1.2.2.11 src/contrib/bind/bin/nslookup/commands.l 1.4.2.5 src/contrib/bind/bin/nslookup/debug.c 1.3.2.6 src/contrib/bind/bin/nslookup/getinfo.c 1.3.2.9 src/contrib/bind/bin/nslookup/main.c 1.3.2.7 src/contrib/bind/doc/man/dig.1 1.3.2.4 src/contrib/bind/doc/man/host.1 1.3.2.5 src/contrib/bind/doc/man/nslookup.8 1.2.2.5 src/contrib/bind/port/freebsd/include/port_after.h 1.6.2.9 src/contrib/bind/port/freebsd/include/port_before.h 1.1.1.2.2.6 RELENG_5_1 src/UPDATING 1.251.2.13 src/sys/conf/newvers.sh 1.50.2.13 src/contrib/bind/Version 1.1.1.11.2.1 src/contrib/bind/bin/named/ns_resp.c 1.1.1.11.2.1 RELENG_5_0 src/UPDATING 1.229.2.25 src/sys/conf/newvers.sh 1.48.2.20 src/contrib/bind/Version 1.1.1.10.2.1 src/contrib/bind/bin/named/ns_resp.c 1.1.1.10.2.1 RELENG_4_9 src/UPDATING 1.73.2.89.2.2 src/sys/conf/newvers.sh 1.44.2.32.2.2 src/contrib/bind/Version 1.1.1.3.2.9.2.1 src/contrib/bind/bin/named/ns_resp.c 1.1.1.2.2.10.2.1 RELENG_4_8 src/UPDATING 1.73.2.80.2.16 src/sys/conf/newvers.sh 1.44.2.29.2.15 src/contrib/bind/Version 1.1.1.3.2.8.2.1 src/contrib/bind/bin/named/ns_resp.c 1.1.1.2.2.9.2.1 RELENG_4_7 src/UPDATING 1.73.2.74.2.27 src/sys/conf/newvers.sh 1.44.2.26.2.26 src/contrib/bind/Version 1.1.1.3.2.7.2.1 src/contrib/bind/bin/named/ns_resp.c 1.1.1.2.2.7.2.2 RELENG_4_6 src/UPDATING 1.73.2.68.2.56 src/sys/conf/newvers.sh 1.44.2.23.2.44 src/contrib/bind/Version 1.1.1.3.2.6.2.2 src/contrib/bind/bin/named/ns_resp.c 1.1.1.2.2.6.2.3 RELENG_4_5 src/UPDATING 1.73.2.50.2.54 src/sys/conf/newvers.sh 1.44.2.20.2.38 src/contrib/bind/Version 1.1.1.3.2.4.4.2 src/contrib/bind/bin/named/ns_resp.c 1.1.1.2.2.4.4.3 RELENG_4_4 src/UPDATING 1.73.2.43.2.55 src/sys/conf/newvers.sh 1.44.2.17.2.46 src/contrib/bind/Version 1.1.1.3.2.4.2.2 src/contrib/bind/bin/named/ns_resp.c 1.1.1.2.2.4.2.3 - ------------------------------------------------------------------------- VII. References <URL:http://www.kb.cert.org/vuls/id/734644> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (FreeBSD) iD8DBQE/x8/PFdaIBMps37IRAsl8AJ9zgqn4QmO08d9zj9de8/uGKIQBNgCfeHKC tM9nSOzoCrM+O+TpNn6ewt4= =PJi2 -----END PGP SIGNATURE----- _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-security To unsubscribe, send any mail to "[email protected]"