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SuSE: clamav update (SUSE-SA:2007:026) Print E-mail
User Rating:      How can I rate this item?
Posted by Benjamin D. Thomas   
SuSE The AntiVirus scan engine clamav was updated to version 0.90.2. Among other bugs two security problems were fixed which could cause a remote denial of service attack against clamav or potentially be used to execute code.
______________________________________________________________________________

                        SUSE Security Announcement

        Package:                clamav
        Announcement ID:        SUSE-SA:2007:026
        Date:                   Fri, 20 Apr 2007 15:00:00 +0000
        Affected Products:      SUSE LINUX 9.3
                                SUSE LINUX 10.0
                                SUSE LINUX 10.1
                                openSUSE 10.2
                                SUSE SLES 9
                                Open Enterprise Server
                                Novell Linux POS 9
                                SUSE SLES 10
        Vulnerability Type:     remote code execution
        Severity (1-10):        7
        SUSE Default Package:   no
        Cross-References:       CVE-2007-1745, CVE-2007-1997

    Content of This Advisory:
        1) Security Vulnerability Resolved:
             clamav version upgrade to 0.90.2
           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

   The AntiVirus scan engine clamav was updated to version 0.90.2. Among
   other bugs two security problems were fixed which could cause a remote
   denial of service attack against clamav or potentially be used to
   execute code.

   - CVE-2007-1745: The chm_decompress_stream function in
     libclamav/chmunpack.c leaks file descriptors, which has unknown
     impact and attack vectors involving a crafted CHM file.

   - CVE-2007-1997: Integer signedness error in the (1) cab_unstore and
     (2) cab_extract functions in libclamav/cab.c might allow remote
     attackers to execute arbitrary code via a crafted CHM file that
     contains a negative integer, which passes a signed comparison and
     leads to a stack-based buffer overflow.

   Updates for this problem were released on Tuesday  April 17.

2) Solution or Work-Around

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

3) Special Instructions and Notes

   None.

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/clamav-0.90.2-0.1.i586.rpm
          665649e5d1b5f2e2ec072ff6e5acff96
   
   SUSE LINUX 10.1:
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/i586/clamav-0.90.2-0.2.i586.rpm
          a3e3616c1dd19b09be4ae1be22279221
   
   SUSE LINUX 10.0:
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/i586/clamav-0.90.2-0.1.i586.rpm
          3a1aefec54a30a216a46399d46c4dfa5
   
   SUSE LINUX 9.3:
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/clamav-0.90.2-0.1.i586.rpm
          31696e4e0837aab02429695bbb11093d
   
   Power PC Platform:
   
   openSUSE 10.2:
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/ppc/clamav-0.90.2-0.1.ppc.rpm
          1a497a6200da361e3799f4f2ab4091e7
   
   SUSE LINUX 10.1:
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/ppc/clamav-0.90.2-0.2.ppc.rpm
          12c6ed4e2cbb5405838deb2e22bced54
   
   SUSE LINUX 10.0:
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/ppc/clamav-0.90.2-0.1.ppc.rpm
          704a40de922c2eb8c5841c40fe19050c
   
   x86-64 Platform:
   
   openSUSE 10.2:
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/x86_64/clamav-0.90.2-0.1.x86_64.rpm
          641d35e63c0ce45bb86099a4a26d4fe6
   
   SUSE LINUX 10.1:
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/x86_64/clamav-0.90.2-0.2.x86_64.rpm
          14ee14fc3cbcf9f08937b97998441bef
   
   SUSE LINUX 10.0:
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/x86_64/clamav-0.90.2-0.1.x86_64.rpm
          ca599326fc97e05e41e6ac793ee63c21
   
   SUSE LINUX 9.3:
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/clamav-0.90.2-0.1.x86_64.rpm
          1a00a64d6b88ce2465b65d61cf2031ed
   
   Sources:
   
   openSUSE 10.2:
   ftp://ftp.suse.com/pub/suse/update/10.2/rpm/src/clamav-0.90.2-0.1.src.rpm
          2d24ba99281475f4884dd706dea265c9
   
   SUSE LINUX 10.1:
   ftp://ftp.suse.com/pub/suse/update/10.1/rpm/src/clamav-0.90.2-0.2.src.rpm
          7bc311314710d124861172e485056ccd
   
   SUSE LINUX 10.0:
   ftp://ftp.suse.com/pub/suse/i386/update/10.0/rpm/src/clamav-0.90.2-0.1.src.rpm
          99ac20be92f82f512d5f4a59feee6460
   
   SUSE LINUX 9.3:
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/src/clamav-0.90.2-0.1.src.rpm
          7cdb83cd4f29d4963cf4fa563b51d9fc
   
   Our maintenance customers are notified individually. The packages are
   offered for installation from the maintenance web:
   
   Open Enterprise Server
     http://support.novell.com/techcenter/psdb/50a5cb718f20761dd7e0b6b4e0935c52.html
   
   Novell Linux POS 9
     http://support.novell.com/techcenter/psdb/50a5cb718f20761dd7e0b6b4e0935c52.html
   
   SUSE SLES 10
     http://support.novell.com/techcenter/psdb/50a5cb718f20761dd7e0b6b4e0935c52.html
   
   SUSE SLES 9
     http://support.novell.com/techcenter/psdb/50a5cb718f20761dd7e0b6b4e0935c52.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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