openSUSE 10.2, 10.3, 11.0: SUSE-SA:2008:039 Moderate: net-snmp DoS

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______________________________________________________________________________

                        SUSE Security Announcement

        Package:                net-snmp
        Announcement ID:        SUSE-SA:2008:039
        Date:                   Fri, 01 Aug 2008 13:00:00 +0000
        Affected Products:      openSUSE 10.2
                                openSUSE 10.3
                                openSUSE 11.0
                                SUSE SLES 9
                                Novell Linux Desktop 9
                                Open Enterprise Server
                                Novell Linux POS 9
                                SUSE Linux Enterprise Desktop 10 SP1
                                SLE SDK 10 SP1
                                SLE SDK 10 SP2
                                SUSE Linux Enterprise Server 10 SP1
                                SUSE Linux Enterprise Desktop 10 SP2
                                SUSE Linux Enterprise Server 10 SP2
        Vulnerability Type:     authentication bypass, denial-of-service
        Severity (1-10):        6
        SUSE Default Package:   no
        Cross-References:       CVE-2008-0960
                                CVE-2008-2292

    Content of This Advisory:
        1) Security Vulnerability Resolved:
            - authentication bypass
            - denial-of-service
           Problem Description
        2) Solution or Work-Around
        3) Special Instructions and Notes
        4) Package Location and Checksums
        5) Pending Vulnerabilities, Solutions, and Work-Arounds:
            - viewvc/subversion
        6) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Problem Description and Brief Discussion

   The net-snmp daemon implements the "simple network management protocol".
   The version 3 of SNMP as implemented in net-snmp uses the length of the
   HMAC in a packet to verify against a local HMAC for authentication.
   An attacker can therefore send a SNMPv3 packet with a one byte HMAC and
   guess the correct first byte of the local HMAC with 256 packets (max).

   Additionally a buffer overflow in perl-snmp was fixed that can cause a
   denial-of-service/crash.

2) Solution or Work-Around

   Please install the update package.

3) Special Instructions and Notes

   Please restart net-snmp 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 11.0:
                  
   openSUSE 10.3:
                  
   openSUSE 10.2:
            
   x86-64 Platform:
   
   openSUSE 11.0:
      
   openSUSE 10.3:
      
   openSUSE 10.2:
      
   Sources:
   
   openSUSE 11.0:
      
   openSUSE 10.3:
      
   openSUSE 10.2:
      
   Our maintenance customers are notified individually. The packages are
   offered for installation from the maintenance web:
   
   Open Enterprise Server
     
   
   Novell Linux POS 9
     
   
   Novell Linux Desktop 9
     
   
   SUSE Linux Enterprise Server 10 SP1
     
   
   SUSE Linux Enterprise Server 10 SP2
     
   
   SLE SDK 10 SP2
     
   
   SLE SDK 10 SP1
     
   
   SUSE Linux Enterprise Desktop 10 SP1
     
   
   SUSE Linux Enterprise Desktop 10 SP2
     
   
   SUSE SLES 9
     

______________________________________________________________________________

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

   - viewvc/subversion
     This update of subversion fixes multiple vulnerabilities.
     - CVE-2008-1290: list CVS or SVN commits on "all-forbidden" files
     - CVE-2008-1291: directly access hidden CVSROOT folders     - CVE-2008-1292: expose restricted content via the revision view,
                      the log history, or the diff view

______________________________________________________________________________

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.

    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.

  - 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
                .

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

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