FreeBSD Security Advisory FreeBSD-SA-03:19.bind

From: FreeBSD Security Advisories (security-advisories_at_freebsd.org)
Date: 11/28/03

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    =============================================================================
    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>
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