openSUSE: 2009-006 High: openssl Certificate Bypass Issue

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______________________________________________________________________________

                        SUSE Security Announcement

        Package:                openssl
        Announcement ID:        SUSE-SA:2009:006
        Date:                   Fri, 23 Jan 2009 16:00:00 +0000
        Affected Products:      openSUSE 10.3
                                openSUSE 11.0
                                openSUSE 11.1
                                SuSE Linux Enterprise Server 8
                                SUSE SLES 9
                                Novell Linux Desktop 9
                                Open Enterprise Server
                                Novell Linux POS 9
                                SLE SDK 10 SP2
                                SUSE Linux Enterprise Desktop 10 SP2
                                SUSE Linux Enterprise 10 SP2 DEBUGINFO
                                SUSE Linux Enterprise Server 10 SP2
        Vulnerability Type:     SSL certificate checking bypass
        Severity (1-10):        8
        SUSE Default Package:   yes
        Cross-References:       CVE-2008-5077

    Content of This Advisory:
        1) Security Vulnerability Resolved:
             OpenSSL EVP_VerifyFinal return value checking
           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 OpenSSL certificate checking routines EVP_VerifyFinal can return
   negative values and 0 on failure. In some places negative values
   were not checked and considered successful verification.
   Prior to this update it was possible to bypass the certification
   chain checks of openssl.

   This advisory is for the updates that improve the verification of
   return values inside the OpenSSL library itself.

   Several client programs also need to receive fixes to check that
   return value.

   A bind update which fixes this was already released yesterday,
   tracked in SUSE-SA:2009:005.
   A boinc-client and libnasl update was also released yesterday.
   Updates for ntp,xntp, and eID-Belgium are being prepared.

2) Solution or Work-Around

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

3) Special Instructions and Notes

   Restart applications using OpenSSL.

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 11.1:
            
   openSUSE 11.0:
               
   openSUSE 10.3:
               
   Platform Independent:

   openSUSE 11.1:
   
   Power PC Platform:

   openSUSE 11.1:
               
   openSUSE 11.0:
                  
   openSUSE 10.3:
                  
   x86-64 Platform:

   openSUSE 11.1:
               
   openSUSE 11.0:
                  
   openSUSE 10.3:
                  
   Sources:

   openSUSE 11.1:
      
   openSUSE 11.0:
   
   openSUSE 10.3:
   
   Our maintenance customers are notified individually. The packages are
   offered for installation from the maintenance web:

   SUSE Linux Enterprise Server 10 SP2
     

   SLE SDK 10 SP2
     

   SUSE Linux Enterprise 10 SP2 DEBUGINFO
     

   SUSE Linux Enterprise Desktop 10 SP2
     

   Open Enterprise Server
     

   Novell Linux POS 9
     

   Novell Linux Desktop 9
     

   SUSE SLES 9
     

   SuSE Linux Enterprise Server 8
     

______________________________________________________________________________

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.

    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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