[Full-Disclosure] SUSE Security Announcement: gaim (SuSE-SA:2004:004)

From: Thomas Biege (thomas_at_suse.de)
Date: 01/29/04

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    To: full-disclosure@lists.netsys.com
    Date: Thu, 29 Jan 2004 13:46:54 +0100 (CET)
    
    

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

    ______________________________________________________________________________

                            SUSE Security Announcement

            Package: gaim
            Announcement-ID: SuSE-SA:2004:004
            Date: Thrusday, Jan 29th 2004 10:30 MET
            Affected products: 8.0, 8.1, 8.2, 9.0
                                    SuSE Linux Desktop 1.0
            Vulnerability Type: remote system compromise
            Severity (1-10): 5
            SUSE default package: no
            Cross References:

        Content of this advisory:
            1) security vulnerability resolved:
                - two buffer overflows
               problem description, discussion, solution and upgrade information
            2) pending vulnerabilities, solutions, workarounds:
                - kernel binaries for SLES8 AMD64
                - mc
                - mod_gzip
                - tripwire
                - XDM (XFree86, xf86)
                - 3ddiag
                - mod_auth_shadow
                - cvsup
                - nmap
                - netpbm
                - zebra
                - quagga
                - tcpdump
                - mod_python
            3) standard appendix (further information)

    ______________________________________________________________________________

    1) problem description, brief discussion, solution, upgrade information

        Gaim is a multi-protocol instant-messaging client. Stefan Esser found
        12 vulnerabilities in gaim that can lead to a remote system compromise
        with the privileges of the user running GAIM.
        The GAIM package that SUSE LINUX ships is affected by just two of these
        bug:
            - Yahoo Packet Parser Overflow
            - HTTP Proxy Connect Overflow

        The first vulnerability is easy to exploit and results in a classic stack
        overflow which can be used to execute arbitrary code.
        The latter vulnerability requires the gaim client use a HTTP proxy under
        the control of the attacker. The exploitation of this bug results in
        arbitrary code execution too.

        There is no known workaround.

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

        Intel i386 Platform:

        SuSE-9.0:
        ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/gaim-0.67-65.i586.rpm
          09f8d12dd52e246cf32dca8ad3374f39
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/gaim-0.67-65.i586.patch.rpm
          3a633e341b9e56facdbe0250b55dd33a
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/gaim-0.67-65.src.rpm
          5ee6a86077c0297a64815532782f7a54

        SuSE-8.2:
        ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/gaim-0.59.8-60.i586.rpm
          7a269744304f72bf951c7bd6974560f2
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/gaim-0.59.8-60.i586.patch.rpm
          e7b18f0da02c1c4392dc1b03e835a827
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/gaim-0.59.8-60.src.rpm
          ae7d7b1c9735696244547a0d6a5ee92e

        SuSE-8.1:
        ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/gaim-0.59-158.i586.rpm
          22b1d4be5737906f8ff0975918279034
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/gaim-0.59-158.i586.patch.rpm
          7644020869e92cc980b881efebf9d617
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/gaim-0.59-158.src.rpm
          cd1532f71a79ed32d016d456a844ff4b

        SuSE-8.0:
        ftp://ftp.suse.com/pub/suse/i386/update/8.0/gnm3/gaim-0.50-187.i386.rpm
          7dcb581b78bf8ab61e82bf0836a4357e
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.0/gnm3/gaim-0.50-187.i386.patch.rpm
          5a6f596538edc56e0b3a70a23200c21e
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/gaim-0.50-187.src.rpm
          d38c8da629941eecef7f75d6a5ea9e80

    ______________________________________________________________________________

    2) Pending vulnerabilities in SUSE Distributions and Workarounds:

        - kernel binaries for SLES8 AMD64
        Due to a human failure the kernel binaries of SuSE Linux Enterprise
        Server 8 for AMD64 lack the fix described in SuSE-SA:2004:003. The
        kernel-source packages and the packages for IA64 are *not* affected.
        New packages are available at our maintenance-web.

        - mc
        By using a special combination of links in archive files it is possible
        to execute arbitrary commands while mc tries to open it in its VFS.
        New packages are available on our FTP servers.

        - mod_gzip (apache-contrib)
        The apache module mod_gzip is vulnerable to remote code execution
        while running in debug-mode. We do not ship this module in debug-mode
        but future versions will include the fix.
        Additionally the mod_gzip code was audited to fix more possibly security
        related bugs.
        After more testing a new apache-contrib RPM package will be released.

        - tripwire
        Tripwire is a file integrity checker. The version of tripwire included
        with SuSE Linux 9.0 crashs when a requested file does not exists.
        New packages are available on our FTP servers.

        - XDM (XFree86, xf86)
        A missing check for failure conditions in the PAM code of XDM
        can lead to local root access in conjunction with Kerberos or
        other authentication methods.
        New packages are available on our FTP servers.

        - 3ddiag
        Some 3ddiag scripts handle temporary files in an insecure manner.
        Thanks to Stefan Nordhausen <nordhaus at informatik.hu-berlin.de>
        for reporting some of these issues.
        New packages are available on our FTP servers.

        - mod_auth_shadow (apache-contrib)
        This apache module ignores account expiration dates.
        The update will be released together with mod_gzip.

        - cvsup
        cvsup uses a library path which is world-writeable. This behavior
        can lead to local privilege escalation.
        Thanks to Matthias Andree for notifying us.
        Upcoming SuSE Linux versions have an automatic check enabled to detect
        these types of bugs.
        New packages are available on our FTP servers.

        - nmap
        Due to a bad interaction between kernel and user-space for pre-
        calculated IP checksums nmap did not work on SUSE LINUX 9.0.
        New packages are available on our FTP servers.

        - netpbm
        Some tools in the netpbm suite create files in an insecure manner
        that can lead to local privilege escalation.
        New packages will be available soon.

        - zebra
        Local users can send malicious netlink messages that cause
        denial-of-service conditions in zebra.
        New packages will be available soon.

        - quagga
        Local users can send malicious netlink messages that cause
        denial-of-service conditions in the routing-daemon quagga.
        New packages are available on our FTP servers.

        - tcpdump
        The code for handling ISAKMP and RADIUS messages contained bugs
        which allowed remote attackers to crash tcpdump or to execute
        arbitrary code.
        New packages are available on our FTP servers.

        - mod_python
        A remote denial-of-service attack can be triggered against the Apache
        web server by sending a specific query string that is processed by
        mod_python.
        New packages will be available soon.

    ______________________________________________________________________________

    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 disrecommend to subscribe to security lists which cause the
           email 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
           filename of the rpm package that you have downloaded. Of course,
           package authenticity verification can only target an un-installed 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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