SUSE Security Announcement: RealPlayer buffer overflow in RAM file handling (SUSE-SA:2005:026)

From: Marcus Meissner (meissner_at_suse.de)
Date: 04/20/05

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    Date: Wed, 20 Apr 2005 09:31:37 +0200
    To: bugtraq@securityfocus.com
    
    

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

    ______________________________________________________________________________

                            SUSE Security Announcement

            Package: RealPlayer
            Announcement-ID: SUSE-SA:2005:026
            Date: Wed, 20 Apr 2005 09:00:00 +0000
            Affected products: 9.2, 9.3
                                    Novell Linux Desktop 9

            Vulnerability Type: remote code execution
            Severity (1-10): 8
            SUSE default package: yes
            Cross References:

        Content of this advisory:
            1) security vulnerability resolved:
                 buffer overflow in RAM file handling
               problem description
            2) solution/workaround
            3) special instructions and notes
            4) package location and checksums
            5) pending vulnerabilities, solutions, workarounds:
                See SUSE Security Summary Report.
            6) standard appendix (further information)

    ______________________________________________________________________________

    1) problem description, brief discussion

        This update fixes a security issue within the RealPlayer media player.

        A remote attacker could craft a special .RAM (Real Audio Media) file
        which would cause a buffer overflow when played within RealPlayer.

        This is the Real Player Update as referenced on this page:

        http://service.real.com/help/faq/security/050419_player/EN/

    2) solution/workaround

        None, please install the updated packages.

    3) special instructions and notes

        Restart RealPlayer if running.

    4) package location and checksums

        Please 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 to install from the maintenance web.

        x86 Platform:

        SUSE Linux 9.3:
        ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/RealPlayer-10.0.4-1.1.i586.rpm
               b6ca6d5c87690fca385981ccf272ddf1

        SUSE Linux 9.2:
        ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/RealPlayer-10.0.4-1.1.i586.rpm
               7e87cb712e6f07b9bdefe4f2ea79d6d0

    ______________________________________________________________________________

    5) Pending vulnerabilities in SUSE Distributions and Workarounds:

        See SUSE Security Summary Report.
    ______________________________________________________________________________

    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 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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