SUSE Security Summary Report (SUSE-SR:2005:012)

29 Apr 2005

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______________________________________________________________________________

                        SUSE Security Summary Report

        Announcement-ID:        SUSE-SR:2005:012
        Date:                   Fri, 29 Apr 2005 14:00:00 +0000
        Cross References:       CAN-2005-0468
                                CAN-2005-0469
                                CAN-2005-0638
                                CAN-2005-0639
                                CAN-2005-0718
                                CAN-2005-0753
                                CAN-2005-1042
                                CAN-2005-1043
                                CAN-2005-1046
                                CAN-2005-1195

    Content of this advisory:
        1) solved security vulnerabilities:
            - heimdal telnet buffer overflow
            - php4, php5 bugs in exif parser
            - cvs buffer overflow
            - squid DoS
            - xli shell quoting problems
        2) pending vulnerabilities, solutions, workarounds:
            - perl-Net-Server format string bug
            - xine buffer overflow
            - kimgio buffer overflows
        3) standard appendix (further information)

______________________________________________________________________________

1) solved security vulnerabilities

   To avoid spamming lists with advisories for every small incident,
   we will release weekly summary advisories for issues where we have
   released updates without a full advisory. Since these are minor
   issues, md5sums and ftp urls are not included.

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

   - heimdal telnet buffer overflow
     This update fixes the telnet buffer overflows referenced by
     CAN-2005-0469 and CAN-2005-0468 which also affected
     the telnet client of the heimdal package.

     All SUSE Linux based products were affected.

   - php4, php5 bugs in exif parser
     Bugs in the exif parser could allow an attacker to execute arbitrary code
     or cause denial of service.

     This is tracked by the Mitre CVE IDs CAN-2005-1042 and CAN-2005-1043

     All SUSE Linux based products were affected.

   - cvs buffer overflow
     This update fixes a buffer overflows which allowed remote attackers to
     execute arbitrary code.

     This is tracked by the Mitre CVE ID CAN-2005-0753

     All SUSE Linux based products were affected.

   - squid DoS
     Squid could crash when a client unexpectedly aborted a PUT or POST
     connection. This problem has been fixed.

     This is tracked by the Mitre CVE ID CAN-2005-0718

     All SUSE Linux based products were affected.

   - xli shell quoting problems
     This update of xli fixes a bug in the shell meta-character handling behaviour
     while uncompressing image files. This bug can be exploited to execute arbitrary
     shell commands. In conjunction with mail-clients it can even be exploited
     remotely. Additionally integer overflows while allocating memory were fixed.

     This is tracked by the Mitre CVE IDs CAN-2005-0638 and CAN-2005-0639

     All SUSE Linux products were affected.

______________________________________________________________________________

2) Pending vulnerabilities in SUSE Distributions and Workarounds:

   - perl-Net-Server format string bug
     A format string problem was found in the logging routines of the
     perl-Net-Server perl module collection.

     All SUSE Linux products are affected.

   - xine buffer overflow
     Buffer overflows in the code used to handle MMST streams or RealMedia
     RTSP streams allow remote malicious servers to execute arbitrary code.

     This is tracked by the Mitre CVE ID CAN-2005-1195

     All SUSE Linux based products are affected.

   - kimgio buffer overflows
     Buffer overflows in the kimgio library of KDE potentially allows remote attackers to
     execute arbitrary code though specially crafted image files.

     This is tracked by the Mitre CVE ID CAN-2005-1046

     All SUSE Linux based products are affected.

______________________________________________________________________________

3)  standard appendix: authenticity verification, additional information

  - Package authenticity verification:

    SUSE update packages are available on many mirror ftp servers all over
    the world. While this service is being considered valuable and important
    to the free and open source software community, many users wish to be
    sure about the origin of the package and its content before installing
    the package. 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) md5sums as provided in the (cryptographically signed) announcement.
    2) using the internal gpg signatures of the rpm package.

    1) execute the command
        md5sum <name-of-the-file.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
       announcement. Since the announcement containing the checksums is
       cryptographically signed (usually using the key security@suse.de),
       the checksums show proof of the authenticity of the package.
       We recommend against subscribing to security lists that cause the
       e-mail message containing the announcement to be modified
       so that the signature does not match after transport through the mailing
       list software.
       Downsides: You must be able to verify the authenticity of the
       announcement in the first place. If RPM packages are being rebuilt
       and a new version of a package is published on the ftp server, all
       md5 sums for the files are useless.

    2) 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, where <file.rpm> is the
       file name of the rpm package that you have downloaded. Of course,
       package authenticity verification can only target an uninstalled rpm
       package file.
       Prerequisites:
        a) gpg is installed
        b) The package is signed using a certain key. The public part of this
           key must be installed by the gpg program in the directory
           ~/.gnupg/ under the user's home directory who performs the
           signature verification (usually root). You can import the key
           that is used by SUSE in rpm packages for SUSE Linux by saving
           this announcement to a file ("announcement.txt") and
           running the command (do "su -" to be root):
            gpg --batch; gpg < announcement.txt | gpg --import
           SUSE Linux distributions version 7.1 and thereafter install the
           key "build@suse.de" upon installation or upgrade, provided that
           the package gpg is installed. The file containing the public key
           is placed at the top-level directory of the first CD (pubring.gpg)
           and at ftp://ftp.suse.com/pub/suse/pubring.gpg-build.suse.de .

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

    suse-security@suse.com
        -   general/linux/SUSE security discussion.
            All SUSE security announcements are sent to this list.
            To subscribe, send an email 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 email 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> respectively.

    =====================================================================
    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,
    it is desired that the clear-text signature shows proof of the
    authenticity of the text.
    SUSE Linux AG makes 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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Ludwig Nussel

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