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SUSE Security Announcement: heimdal telnetd remote buffer overflow (SUSE-SA:2005:040)
From: Marcus Meissner <meissner () suse de>
Date: Wed, 06 Jul 2005 17:31:54 +0200


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______________________________________________________________________________

                        SUSE Security Announcement

        Package:                heimdal
        Announcement ID:        SUSE-SA:2005:040
        Date:                   Wed, 06 Jul 2005 14:00:00 +0000
        Affected Products:      8.2, 9.0, 9.1, 9.2
                                SUSE Linux Desktop 1.0
                                SUSE Linux Enterprise Server 8, 9
                                Novell Linux Desktop 9
        Vulnerability Type:     remote code execution
        Severity (1-10):        9
        SUSE Default Package:   yes
        Cross-References:       CAN-2005-2040

    Content of This Advisory:
        1) Security Vulnerability Resolved:
             heimdal telnetd remote buffer overflow
           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

   A remote buffer overflow has been fixed in the heimdal / kerberos
   telnetd daemon which could lead to a remote user executing code as
   root by overflowing a buffer.

   This attack requires the use of the kerberized telnetd of the heimdal
   suite, which is not used by default on SUSE systems.

   This is tracked by the Mitre CVE ID CAN-2005-2040.

2) Solution or Work-Around

   Please install the updated packages.

3) Special Instructions and Notes

   Since the heimdal telnetd is usually started from inetd/xinetd,
   no action is necessary.


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 <file.rpm>

   to apply the update, replacing <file.rpm> with the filename of the
   downloaded RPM package.

   Our maintenance customers are notified individually. The packages are
   offered for installation from the maintenance web.


   x86 Platform:

   SUSE Linux 9.2:
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/heimdal-0.6.2-8.4.i586.rpm
          3c58f2d19431fec5e398dac27df1f4d4

   SUSE Linux 9.1:
   ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/heimdal-0.6.1rc3-55.18.i586.rpm
          d96212ff5cfae6790f33fd5fd2fbaf0e
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/heimdal-0.6.1rc3-55.18.src.rpm
          e5b9e2eede280ee45908e7760119c00a

   SUSE Linux 9.0:
   ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/heimdal-0.6-165.i586.rpm
          810f6b76593cb4188a6f05da62edb983
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/heimdal-0.6-165.src.rpm
          05f4ce0b1bf5a8a277d72206723f5e66

   SUSE Linux 8.2:
   ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/heimdal-0.4e-413.i586.rpm
          8d49e11b757755d4b59c0a2ec922ebb4
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/heimdal-0.4e-413.src.rpm
          35ed1cbb68084f390d58009382c88712

   x86-64 Platform:

   SUSE Linux 9.2:
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/heimdal-0.6.2-8.4.x86_64.rpm
          26fd8fbf592fc8b3f92afff2c2443a1f
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/heimdal-0.6.2-8.4.src.rpm
          34aed06065553bd7b2c20c24c7bbe66b

   SUSE Linux 9.1:
   ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/heimdal-0.6.1rc3-55.18.x86_64.rpm
          628db7ea5c88db6ee84b7d90794e92a3
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/heimdal-0.6.1rc3-55.18.src.rpm
          8c0bd4f6ccee1a87725262d37894b2a2

   SUSE Linux 9.0:
   ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/heimdal-0.6-165.x86_64.rpm
          0fc2978b91c3eee2397fc6c3ae811849
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/heimdal-0.6-165.src.rpm
          ad57d43e4b8d02705fd1e1861bfa56ab


______________________________________________________________________________

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 <file>

    replacing <file> with the name of the file where you saved 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 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 <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 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 <filename.rpm>

       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:

    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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