SUSE Security Summary Report SUSE-SR:2006:016

14 Jul 2006

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______________________________________________________________________________

                        SUSE Security Summary Report

        Announcement ID:        SUSE-SR:2006:016
        Date:                   Fri, 14 Jul 2006 17:00:00 +0000
        Cross-References:       CVE-2004-1488, CVE-2005-4190, CVE-2006-2195
                                CVE-2006-2451, CVE-2006-3093, CVE-2006-3242
                                CVE-2006-3334

    Content of this advisory:
        1) Solved Security Vulnerabilities:
            - Acroread 7.0.8 problems - not affected
            - libpng buffer overflow - not affected
            - wget file overwrite and terminal characters
            - mutt remove overflow by IMAP servers
            - horde cross site scripting problems fixed
        2) Pending Vulnerabilities, Solutions, and Work-Arounds:
            - Local root exploit in Linux kernel
        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.

   - Acroread 7.0.8 problems - not affected
     In SUSE-SA:2006:041 we reported that Acrobat Reader on Linux is
     affected by the problem referenced by CVE-2006-3093.

     Further information showed that this is not the case.

     This means that Acrobat Reader 7.0.5 is not vulnerable to this
     problem.

   - libpng buffer overflow - not affected
     The PNG developers released a new version of libpng, which fixes
     a buffer overflow. This issue is tracked by the Mitre CVE ID
     CVE-2006-3334.

     Our investigations show:
     - With the current interaction between libpng and zlib it is not
       possible to get the error return code that triggers the buffer
       overflow.

     - The overflow would overwrite 2 bytes of stack padding (assuming
       a default padding of 4 bytes).

     - And last but not least it would be caught by _FORTIFY_SOURCE on
       SUSE Linux 10.0 and newer products.

     So no SUSE product is affected by this problem.

   - wget file overwrite and terminal characters
     A security issue was fixed in wget, where evil servers could send
     terminal escape codes to the user calling wget. This would only
     affect interactive sessions. (CVE-2004-1488)

     Additionally the previous ".file" fix was found to be buggy and
     replaced. This bug could lead to ".directories" not being retrievable
     and "_files" being overwritten.

     All SUSE Linux based products were affected by those problems.

   - mutt remove overflow by IMAP servers
     Mutt had a buffer overflow in IMAP name space parsing code which
     may open a possible remote vulnerability (CVE-2006-3242).

     This requires attaching to an "evil" IMAP server.

     All SUSE Linux based products containing mutt were affected.

   - horde cross site scripting problems fixed
     Some cross site scripting problems where fixed in the horde
     framework.

     These are tracked by the Mitre CVE IDs CVE-2005-4190,CVE-2006-2195.

     All SUSE Linux based products containing horde were affected.
______________________________________________________________________________

2) Pending Vulnerabilities, Solutions, and Work-Arounds

   - Local root exploit in Linux kernel
     The Mitre CVE ID CVE-2006-2451 is referencing a local root exploit
     using the prctl() system call.

     SUSE Linux Enterprise Server 9, Novell Linux Desktop 9, Open Enterprise
     Server, SUSE Linux 10.0, SUSE Linux 10.1 and SUSE Linux Enterprise
     (Server and Desktop) 10 are affected by this problem.

     We are preparing updates for this problem, but they will take at
     least a week due to QA turnaround times.

     Temporary Kernel updates can be gotten from our Kernel Of The Day
     repository (unsupported):

     SLES9, NLD9 and OES:
     ftp://ftp.suse.com/pub/projects/kernel/kotd/sles9-<arch>/SLES9_SP3_BRANCH/

     SUSE Linux 10.0:
     ftp://ftp.suse.com/pub/projects/kernel/kotd/10.0-<arch>/SL100_BRANCH/

     SUSE Linux 10.1, SLE10: No fixed kernel of the day available currently.
______________________________________________________________________________

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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