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SuSE: bind remote denial of service Print E-mail
User Rating:      How can I rate this item?
Posted by Benjamin D. Thomas   
SuSE Two security problems were fixed in the ISC BIND nameserver version 9.3.4, which are addressed by this advisory
______________________________________________________________________________

                        SUSE Security Announcement

        Package:                bind
        Announcement ID:        SUSE-SA:2007:014
        Date:                   Tue, 30 Jan 2007 11:00:00 +0000
        Affected Products:      SUSE LINUX 9.3
                                SUSE LINUX 10.0
                                SUSE LINUX 10.1
                                openSUSE 10.2
                                UnitedLinux 1.0
                                SuSE Linux Enterprise Server 8
                                SuSE Linux Openexchange Server 4
                                SuSE Linux Standard Server 8
                                SuSE Linux School Server
                                SUSE LINUX Retail Solution 8
                                SUSE SLES 9
                                Novell Linux Desktop 9
                                Open Enterprise Server
                                Novell Linux POS 9
                                SUSE SLED 10
                                SUSE SLES 10
        Vulnerability Type:     remote denial of service
        Severity (1-10):        5
        SUSE Default Package:   no
        Cross-References:       CVE-2007-0493, CVE-2007-0494

    Content of This Advisory:
        1) Security Vulnerability Resolved:
             remote denial of service problem in BIND
           Problem Description
        2) Solution or Work-Around
        3) Special Instructions and Notes
        4) Package Location and Checksums
        5) Pending Vulnerabilities, Solutions, and Work-Arounds:
            See SUSE Security Summary Report.
        6) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Problem Description and Brief Discussion

   Two security problems were fixed in the ISC BIND nameserver
   version 9.3.4, which are addressed by this advisory:

   CVE-2007-0493: If recursion is enabled, a remote attacker can dereference
   a freed fetch context causing the daemon to abort / crash.

   CVE-2007-0494: By sending specific DNS query responses with multiple
   RRSETS attackers could cause BIND to exit abnormally.

   Updates for SUSE Linux Enterprise Server were released on Friday 26th of January,
   updates for SUSE Linux and openSUSE were released on Monday 29th of January.
2) Solution or Work-Around

   There is no known workaround, please install the update packages.

3) Special Instructions and Notes

   Please close and restart all running instances of bind after the update.

4) Package Location and Checksums

   The preferred method for installing security updates is to use the YaST
   Online Update (YOU) tool. YOU detects which updates are required and
   automatically performs the necessary steps to verify and install them.
   Alternatively, download the update packages for your distribution manually
   and verify their integrity by the methods listed in Section 6 of this
   announcement. Then install the packages using the command

     rpm -Fhv 

   to apply the update, replacing  with the filename of the
   downloaded RPM package.


   x86 Platform:

   openSUSE 10.2:
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-9.3.2-56.1.i586.rpm
          1cbff49e03831710c990961534db5ec1
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-libs-9.3.2-56.1.i586.rpm
          bd6462a783b85946e8e3397fdd972e48
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-utils-9.3.2-56.1.i586.rpm
          ff37774a0bf31c329e834b4ffa3275ed

   SUSE LINUX 10.1:
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/i586/bind-9.3.2-17.15.i586.rpm
          5748e1f4000a2f778f0598b97ee3f41f
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/i586/bind-libs-9.3.2-17.15.i586.rpm
          e88a84c84c7d23e2e5fd4184e040ea36
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/i586/bind-utils-9.3.2-17.15.i586.rpm
          91758b51c5dce9ea1e6c807d0b5a5ec0

   SUSE LINUX 10.0:
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/i586/bind-9.3.2-56.1.i586.rpm
          75b21dd87a6c02af3c129cdac1c914f0
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/i586/bind-libs-9.3.2-56.1.i586.rpm
          e2d482990c6336041ecda4263130cbff
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/i586/bind-utils-9.3.2-56.1.i586.rpm
          b0646b7097fd3221491f2afbe3f9ebbe

   SUSE LINUX 9.3:
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/bind-9.3.2-56.1.i586.rpm
          9f784583c4944a67f4a952220caefc23
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/bind-libs-9.3.2-56.1.i586.rpm
          e42f646c068f947c1d50a62bae1e21e4
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/bind-utils-9.3.2-56.1.i586.rpm
          244eb1e7ab236e4f5fb289569385c41d

   Power PC Platform:

   openSUSE 10.2:
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/ppc/bind-9.3.2-56.1.ppc.rpm
          196da83c1ee0bc0b836590ed4fec2d25
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/ppc/bind-libs-9.3.2-56.1.ppc.rpm
          1f86c42742226e9a5bb7600fec5583ec
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/ppc/bind-utils-9.3.2-56.1.ppc.rpm
          57697a572ef517d8906c6bf4e9d0a7a3

   SUSE LINUX 10.1:
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/ppc/bind-9.3.2-17.15.ppc.rpm
          dba983ba548a847f1024246ff4bb3388
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/ppc/bind-libs-9.3.2-17.15.ppc.rpm
          c15f6131a5484abdb03662e271d58eba
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/ppc/bind-utils-9.3.2-17.15.ppc.rpm
          bb0ea32c59dcfa9a544b96d6e39ac83e

   SUSE LINUX 10.0:
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/ppc/bind-9.3.2-56.1.ppc.rpm
          4c75aad7305260b263671fa1b5d3f90f
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/ppc/bind-libs-9.3.2-56.1.ppc.rpm
          73c8917a37f96f9748394407d7f31706
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/ppc/bind-utils-9.3.2-56.1.ppc.rpm
          534c2ff4a0a31d5fab474d720b290339

   x86-64 Platform:

   openSUSE 10.2:
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/x86_64/bind-9.3.2-56.1.x86_64.rpm
          ba6e1e48cee8fc94e047b0ffa927e405
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/x86_64/bind-libs-32bit-9.3.2-56.1.x86_64.rpm
          ee297428f209bcb73f51599045b06d97
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/x86_64/bind-libs-9.3.2-56.1.x86_64.rpm
          c04b66a303fc420a2682895716798758
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/x86_64/bind-utils-9.3.2-56.1.x86_64.rpm
          2cf0460d5566d12b7cf82a30646d97e0

   SUSE LINUX 10.1:
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/x86_64/bind-9.3.2-17.15.x86_64.rpm
          5b06fe8290edc659fd4e08b972ad8042
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/x86_64/bind-libs-32bit-9.3.2-17.15.x86_64.rpm
          520983bb39f0ebf484054f5c848eb8ec
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/x86_64/bind-libs-9.3.2-17.15.x86_64.rpm
          e0606262be2447a97700c31a259732b8
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/x86_64/bind-utils-9.3.2-17.15.x86_64.rpm
          a3bb7fa67d39b821739d3993a0591729

   SUSE LINUX 10.0:
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/x86_64/bind-9.3.2-56.1.x86_64.rpm
          04f58a6c8dc234adb99a93e379e0e932
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/x86_64/bind-libs-32bit-9.3.2-56.1.x86_64.rpm
          1e4506d5cb2f72c8fa0e037a36f44fbf
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/x86_64/bind-libs-9.3.2-56.1.x86_64.rpm
          ea0e2ad36c5031b57b8edb0a5d0f61d1
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/x86_64/bind-utils-9.3.2-56.1.x86_64.rpm
          dc13d333deeb7a0f9980ffee7df26dae

   SUSE LINUX 9.3:
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/bind-9.3.2-56.1.x86_64.rpm
          5f684d89127ec370d6482f387f9fe53b
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/bind-libs-32bit-9.3-0.1.x86_64.rpm
          eafc69be579bf262055faf7784d76552
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/bind-libs-9.3.2-56.1.x86_64.rpm
          68dbc644298e95f321909f38edc1bc99
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/bind-utils-9.3.2-56.1.x86_64.rpm
          55f114b7938d9e822ffd4a37106f23d9

   Sources:

   openSUSE 10.2:
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/src/bind-9.3.2-56.1.src.rpm
          fa26ab535120777311837ffbcf2fb8b7

   SUSE LINUX 10.1:
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/src/bind-9.3.2-17.15.src.rpm
          4047b6af5646920c8cffdb3c1891b090

   SUSE LINUX 10.0:
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/src/bind-9.3.2-56.1.src.rpm
          e0a354000d30e1cd4c8d05cabf7bfff1

   SUSE LINUX 9.3:
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/src/bind-9.3.2-56.1.src.rpm
          207a60f5455dcfc3c494ac00f9ec49fe

   Our maintenance customers are notified individually. The packages are
   offered for installation from the maintenance web:

   UnitedLinux 1.0
     http://support.novell.com/techcenter/psdb/1906b69f138f410028362737dc020b6c.html

   SuSE Linux Openexchange Server 4
     http://support.novell.com/techcenter/psdb/1906b69f138f410028362737dc020b6c.html

   SuSE Linux Enterprise Server 8
     http://support.novell.com/techcenter/psdb/1906b69f138f410028362737dc020b6c.html

   SuSE Linux Standard Server 8
     http://support.novell.com/techcenter/psdb/1906b69f138f410028362737dc020b6c.html

   SuSE Linux School Server
     http://support.novell.com/techcenter/psdb/1906b69f138f410028362737dc020b6c.html

   SUSE LINUX Retail Solution 8
     http://support.novell.com/techcenter/psdb/1906b69f138f410028362737dc020b6c.html

   Open Enterprise Server
     http://support.novell.com/techcenter/psdb/ebd0655e8b4230a45daa0865dc0cd57a.html

   Novell Linux POS 9
     http://support.novell.com/techcenter/psdb/ebd0655e8b4230a45daa0865dc0cd57a.html

   Novell Linux Desktop 9
     http://support.novell.com/techcenter/psdb/ebd0655e8b4230a45daa0865dc0cd57a.html

   SUSE SLES 10
     http://support.novell.com/techcenter/psdb/ebd0655e8b4230a45daa0865dc0cd57a.html

   SUSE SLED 10
     http://support.novell.com/techcenter/psdb/ebd0655e8b4230a45daa0865dc0cd57a.html

   SUSE SLES 9
     http://support.novell.com/techcenter/psdb/ebd0655e8b4230a45daa0865dc0cd57a.html

______________________________________________________________________________

5) Pending Vulnerabilities, Solutions, and Work-Arounds:

   See SUSE Security Summary Report.
______________________________________________________________________________

6) Authenticity Verification and Additional Information

  - Announcement authenticity verification:

    SUSE security announcements are published via mailing lists and on Web
    sites. The authenticity and integrity of a SUSE security announcement is
    guaranteed by a cryptographic signature in each announcement. All SUSE
    security announcements are published with a valid signature.

    To verify the signature of the announcement, save it as text into a file
    and run the command

      gpg --verify 

    replacing  with the name of the file where you saved the
    announcement. The output for a valid signature looks like:

      gpg: Signature made  using RSA key ID 3D25D3D9
      gpg: Good signature from "SuSE Security Team "

    where  is replaced by the date the document was signed.

    If the security team's key is not contained in your key ring, you can
    import it from the first installation CD. To import the key, use the
    command

      gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc

  - Package authenticity verification:

    SUSE update packages are available on many mirror FTP servers all over the
    world. While this service is considered valuable and important to the free
    and open source software community, the authenticity and the integrity of
    a package needs to be verified to ensure that it has not been tampered
    with.

    There are two verification methods that can be used independently from
    each other to prove the authenticity of a downloaded file or RPM package:

    1) Using the internal gpg signatures of the rpm package
    2) MD5 checksums as provided in this announcement

    1) The internal rpm package signatures provide an easy way to verify the
       authenticity of an RPM package. Use the command

        rpm -v --checksig 

       to verify the signature of the package, replacing  with the
       filename of the RPM package downloaded. The package is unmodified if it
       contains a valid signature from build@suse.de with the key ID 9C800ACA.

       This key is automatically imported into the RPM database (on
       RPMv4-based distributions) and the gpg key ring of 'root' during
       installation. You can also find it on the first installation CD and at
       the end of this announcement.

    2) If you need an alternative means of verification, use the md5sum
       command to verify the authenticity of the packages. Execute the command

         md5sum 

       after you downloaded the file from a SUSE FTP server or its mirrors.
       Then compare the resulting md5sum with the one that is listed in the
       SUSE security announcement. Because the announcement containing the
       checksums is cryptographically signed (by security@suse.de), the
       checksums show proof of the authenticity of the package if the
       signature of the announcement is valid. Note that the md5 sums
       published in the SUSE Security Announcements are valid for the
       respective packages only. Newer versions of these packages cannot be
       verified.

  - SUSE runs two security mailing lists to which any interested party may
    subscribe:

    opensuse-security@opensuse.org
        -   General Linux and SUSE security discussion.
            All SUSE security announcements are sent to this list.
            To subscribe, send an e-mail to
                .

    suse-security-announce@suse.com
        -   SUSE's announce-only mailing list.
            Only SUSE's security announcements are sent to this list.
            To subscribe, send an e-mail to
                .

    =====================================================================
    SUSE's security contact is  or .
    The  public key is listed below.
    =====================================================================
______________________________________________________________________________

    The information in this advisory may be distributed or reproduced,
    provided that the advisory is not modified in any way. In particular, the
    clear text signature should show proof of the authenticity of the text.

    SUSE Linux Products GmbH provides no warranties of any kind whatsoever
    with respect to the information contained in this security advisory.
 
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