SUSE Security Announcement: xshared, XFree86-libs, xorg-x11-libs (SUSE-SA:2004:041)

From: Thomas Biege (thomas_at_suse.de)
Date: 11/17/04

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    -----BEGIN PGP SIGNED MESSAGE-----

    ______________________________________________________________________________

                            SUSE Security Announcement

            Package: xshared, XFree86-libs, xorg-x11-libs
            Announcement-ID: SUSE-SA:2004:041
            Date: Wednesday, Nov 17th 2004 15:00 MET
            Affected products: 8.1, 8.2, 9.0, 9.1, 9.2
                                    SUSE Linux Desktop 1.0
                                    SUSE Linux Enterprise Server 8, 9
                                    Novell Linux Desktop 1.0
            Vulnerability Type: remote system compromise
            Severity (1-10): 8
            SUSE default package: yes
            Cross References: none

        Content of this advisory:
            1) security vulnerability resolved:
                 - several integer overflows
                 - out-of-bounds memory access
                 - shell command execution
                 - path traversal
                 - endless loops
                 - memory leaks
               problem description
            2) solution/workaround
            3) special instructions and notes
            4) package location and checksums
            5) pending vulnerabilities, solutions, workarounds:
                - ImageMagick
                - clamav
                - perl-MIME-Tools, perl-Archive-ZIP
                - apache / mod_include
                - apache2 / mod_SSL
            6) standard appendix (further information)

    ______________________________________________________________________________

    1) problem description, brief discussion

        The XPM library which is part of the XFree86/XOrg project is used by
        several GUI applications to process XPM image files.
        A source code review done by Thomas Biege of the SuSE Security-Team
        revealed several different kinds of bugs.
        The bug types are:
                 - integer overflows
                 - out-of-bounds memory access
                 - shell command execution
                 - path traversal
                 - endless loops
        By providing a special image these bugs can be exploited by remote and/or
        local attackers to gain access to the system or to escalate their local
        privileges.
        

    2) solution/workaround

        No workaround exists to protect against these bugs.
        
        
    3) special instructions and notes

        Please restart the X server or switch to runlevel 3 and back to 5 to make
        sure every GUI application is restarted and uses the new library.
        
        
    4) package location and checksums

        Download the update package for your distribution and verify its
        integrity by the methods listed in section 3) of this announcement.
        Then, install the package using the command "rpm -Fhv file.rpm" to apply
        the update.
        Our maintenance customers are being notified individually. The packages
        are being offered for installation from the maintenance web.

        Smalltalk is the only package using libxpm statically. It will be
        available via YOU too.

            
        x86 Platform:

        SUSE Linux 9.2:
        ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/xorg-x11-libs-6.8.1-15.3.i586.rpm
          395edf444f05b448aa7c7e70455333ce
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/xorg-x11-libs-6.8.1-15.3.i586.patch.rpm
          8d215ce255838120c70ba77ad944a84f
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/xorg-x11-6.8.1-15.3.src.rpm
          3889aee5895035c57c716f370f5e414a

        SUSE Linux 9.1:
        ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/XFree86-libs-4.3.99.902-43.35.3.i586.rpm
          89431783cd8261a970d6ec5484dd09e6
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/XFree86-libs-4.3.99.902-43.35.3.i586.patch.rpm
          8ea579d10465143a2334be812f23561e
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/XFree86-4.3.99.902-43.35.3.src.rpm
          a37eaa7e7b99c5c3e61439f2a4b00b2d

        SUSE Linux 9.0:
        ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/XFree86-libs-4.3.0.1-57.i586.rpm
          a12b2e861f114868fd70997f72536c8b
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/XFree86-libs-4.3.0.1-57.i586.patch.rpm
          c6ea49a796b316aa68dacc51ffd8eb8d
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/XFree86-4.3.0.1-57.src.rpm
          f53026511a470b875b0f9a63c52128d3

        SUSE Linux 8.2:
        ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/XFree86-libs-4.3.0-132.i586.rpm
          b918f14df14961cf89528a930f49d7c4
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/XFree86-libs-4.3.0-132.i586.patch.rpm
          9c9c268bb248f1bcf2ef899ced2d5aa4
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/XFree86-4.3.0-132.src.rpm
          9a7846ddf22d58f9f64704b3a2451640

        SUSE Linux 8.1:
        ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/xshared-4.2.0-269.i586.rpm
          d4549acb039d8bf317bc6052598764c9
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/xshared-4.2.0-269.i586.patch.rpm
          fcfc17915fdddb48ea84e4d528752edc
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/xf86-4.2.0-269.src.rpm
          3e1d6cf799d0a8e10e2597458264812e

        x86-64 Platform:

        SUSE Linux 9.2:
        ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/xorg-x11-libs-32bit-9.2-200411100529.x86_64.rpm
          e1a271567b2c784aedf3b10f60bbf8a1
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/xorg-x11-libs-32bit-9.2-200411100529.x86_64.patch.rpm
          fe95d10e1287ebbe56ba8d7a07954431
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/src/baselibs-32bit-9.2-200411100529.src.rpm
          da697a970a5672a96016fff405f72692

        SUSE Linux 9.1:
        ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/XFree86-libs-4.3.99.902-43.35.3.x86_64.rpm
          37b2d73337bd0d70dcc092c0e15a0911
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/XFree86-libs-4.3.99.902-43.35.3.x86_64.patch.rpm
          d72e54995bd6468cf1ea78da81546a69
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/XFree86-4.3.99.902-43.35.3.src.rpm
          0158b2653157f518f8dcf030927c2107

        SUSE Linux 9.0:
        ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/XFree86-libs-4.3.0.1-57.x86_64.rpm
          06a4fd1bd6eeb43fd82e18b9a255ff78
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/XFree86-libs-4.3.0.1-57.x86_64.patch.rpm
          da96d1c51020a7de70195458b197fa3b
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/XFree86-4.3.0.1-57.src.rpm
          f369153e40af338af2fd67957db09cff
              
    ______________________________________________________________________________

    5) Pending vulnerabilities in SUSE Distributions and Workarounds:

        - ImageMagick
          This update fixes an additional problem in the EXIF handling of
          ImageMagick, which could lead to a buffer overflow. This could enable
          remote attackers feeding handcrafted images to execute code as the
          user handling the image.
          New packages are available.
          
        - clamav
          The clamav version shipped with SUSE Linux is too old for the new
          data files. The version has been upgraded to 0.80.

        - perl-Mime-Tools / perl-Archive-ZIP
          Problems in the perl-MIME-Tools and perl-Archive-ZIP packages have
          been found which could allow virii to pass virus scanners using those
          packages (like for instance clamav). Fixed packages are in testing
          and will be released soon.

        - Apache 1.3 / mod_include
          A potential buffer overflow and a argument sanitization problem
          were found in the mod_include Apache 1.3 module. These issues
          are tracked as CAN-2004-0940 and CAN-2004-0492 by Mitre CVE.
          Fixed packages are in testing and will be released soon.

        - Apache 2 / mod_SSL
          SSL Ciphersuite bypass problems were identified and fixed by the
          Apache team in Apache 2. This is tracked under the Mitre CVE ID
          CAN-2004-0885. Fixed packages are in testing and will be released
          soon.
    ______________________________________________________________________________

    6) 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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