SUSE Security Summary Report SUSE-SR:2006:023

27 Sep 2006

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______________________________________________________________________________

                        SUSE Security Summary Report

        Announcement ID:        SUSE-SR:2006:023
        Date:                   Wed, 27 Sep 2006 14:00:00 +0000
        Cross-References:       CVE-2004-2655, CVE-2006-3739, CVE-2006-3740
                                CVE-2006-4019, CVE-2006-4031, CVE-2006-4192
                                CVE-2006-4226, CVE-2006-4227, CVE-2006-4790

    Content of this advisory:
        1) Solved Security Vulnerabilities:
            - X11 error handling in CID fonts
            - mysql authorization problem
            - xmms-plugins buffer overflow
            - gnutls RSA signature forgery
            - squirrelmail security problem
            - xscreensaver locking without keyboard grab
            - newpg,libksba crashes on signature verify
            - bind remote denial of service problems
        2) Pending Vulnerabilities, Solutions, and Work-Arounds:
            - kernel update
        3) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Solved Security Vulnerabilities

   To avoid flooding mailing lists with SUSE Security Announcements for minor
   issues, SUSE Security releases weekly summary reports for the low profile
   vulnerability fixes. The SUSE Security Summary Reports do not list md5 sums
   or download URLs like the SUSE Security Announcements that are released for
   more severe vulnerabilities.

   Fixed packages for the following incidents are already available on our FTP
   server and via the YaST Online Update.

   - X11 security problem in handling of CID fonts

     An integer overflow vulnerability when rendering CID-keyed fonts
     in the X Server was fixed.

     This problem is tracked by the Mitre CVE IDs
     CVE-2006-3739/CVE-2006-3740.

     The update was released on 19th September for all SUSE Linux based
     distributions.

   - mysql authorization problem

     The database server mysql was updated to fix several security
     vulnerabilities.

     CVE-2006-4031: authorization bypass through a previously created
                    MERGE table
     CVE-2006-4226: authorization bypass on case sensitive file systems
                    to databases differing only in capitalization (getting
                    access to 'Foo' even if you only have access to 'foo').
     CVE-2006-4227: argument evaluation in suid routines was done in
                    the privilege context of the routine definer instead
                    of the caller.

     Updates for this problem have been released for all SUSE Linux
     based distributions on September 22th.

   - xmms-plugins buffer overflow

     When using the XMMS plugin bundle package (xmms-plugins) specially
     crafted AMF files could potentially be used to exploit a heap based
     buffer overflow in libmodplug (CVE-2006-4192).

     Updates for all SUSE Linux versions were released on September 21st.

   - gnutls RSA signature forgery

     The GNU TLS library was also affected by the RSA signature forgery
     problem, where excess data was not checked during signature checking
     with RSA keys with exponent 3.

     This problem could be used to fake those RSA signatures. (CVE-2006-4790).

     Updates for all SUSE Linux based distributions were released on
     September 27th.

   - squirrelmail security problem

     A minor bug was fixed in the squirrelmail webmail front end were
     authenticated users can modify the preferences of other users.

     This problem is tracked by the Mitre CVE ID CVE-2006-4019 and was
     released on September 15th for SUSE Linux 9.2 up to 10.0.

   - xscreensaver locking without keyboard grab

     xscreensaver locked the screen even if it failed to grab the
     keyboard. Therefore it was possible to accidentally type the password
     into a different program than the screen saver. rdesktop is known
     to expose this problem.

     The Mitre CVE ID CVE-2004-2655 was assigned to this problem and
     it was fixed for SUSE Linux Enterprise Server 8 and 9, and Novell
     Linux Desktop 9.

   - newpg,libksba crashes on signature verify

     The gpgsm program crashed when verifying a signature with certain
     malformed x.509 certificates.

     This update was released for all affected SUSE Linux Distributions.

   - bind remote denial of service problems

     This update fixes two vulnerabilities in bind that allow a remote
     attacker to trigger a denial-of-service attack. (VU#697164 - BIND
     INSIST failure due to excessive recursive queries, VU#915404 -
     BIND assertion failure during SIG query processing)

     Up to now only SUSE Linux Enterprise 10 fixed packages were released,
     others are currently QA tested.
______________________________________________________________________________

2) Pending Vulnerabilities, Solutions, and Work-Arounds

   - current kernel update

     The packages of the last kernel update have almost all been released
     for our customers, except SLES 10 for S/390. Once this last kernel
     has been released, a separate security advisory will be published.
______________________________________________________________________________

3) 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 <file>

    replacing <file> with the name of the file containing the announcement.
    The output for a valid signature looks like:

      gpg: Signature made <DATE> using RSA key ID 3D25D3D9
      gpg: Good signature from "SuSE Security Team <security@suse.de>"

    where <DATE> 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 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 <file.rpm>

    to verify the signature of the package, replacing <file.rpm> 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 included at the end of this
    announcement.

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

    suse-security@suse.com
        -   General Linux and SUSE security discussion.
            All SUSE security announcements are sent to this list.
            To subscribe, send an e-mail to
                <suse-security-subscribe@suse.com>.

    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-security-announce-subscribe@suse.com>.

    For general information or the frequently asked questions (FAQ)
    send mail to <suse-security-info@suse.com> or
    <suse-security-faq@suse.com>.

    =====================================================================
    SUSE's security contact is <security@suse.com> or <security@suse.de>.
    The <security@suse.de> 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.

Type Bits/KeyID     Date       User ID
pub  2048R/3D25D3D9 1999-03-06 SuSE Security Team <security@suse.de>
pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@suse.de>

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Marcus Meissner

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