Mailinglist Archive: opensuse-security-announce (6 mails)

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SUSE Security Summary SUSE-SR:2004:01
  • From: Marcus Meissner <meissner@xxxxxxx>
  • Date: Wed, 24 Nov 2004 11:10:25 +0000 (UTC)
  • Message-id: <20041124110746.GA2210@xxxxxxx>
-----BEGIN PGP SIGNED MESSAGE-----

______________________________________________________________________________

                        SUSE Security Summary Report

        Announcement-ID:        SUSE-SR:2004:001
        Date:                   Wednesday, Nov 24th 2004 12:00 MEST
        Cross References:       CAN-2004-0956
                                CAN-2004-0835
                                CAN-2004-0836
                                CAN-2004-0957
                                CAN-2004-0837
                                CAN-2004-0885
                                CAN-2004-0940
                                CAN-2004-0942

    Content of this advisory:
        1) solved security vulnerabilities:
            - ImageMagick integer overflow in EXIF handling
            - acpid directory world writable problem
            - several mysql bugs
            - perl-MIME-Tools mime boundary handling
            - apache denial of service
            - apache1 / mod_include local buffer overflow
            - apache2 / mod_SSL cipher suite bypass
            - tftp buffer overflows
            - xpdf integer overflows
            - xine-lib buffer overflows
            - gd integer overflows

        2) pending vulnerabilities, solutions, workarounds:
            - kernel problems

        3) standard appendix (further information)

______________________________________________________________________________

1) problem description, brief discussion

   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.

   Fixed packages are available on our FTP server and via
   the YaST Online Update.

    - ImageMagick

        ImageMagick is an collection of command-line tools and libraries
        to manipulate images. The EXIF JPEG tag handling routines
        had a integer overflow which could lead to memory being
        overwritten.

    - acpid

        acpid is a daemon watching for ACPI status changes and key presses.
        A bad umask handling lead to acpid creating a world writable
        directory.

    - mysql

        Several problems were found in the mysql database server.

        CAN-2004-0956:  Crash with MATCH..AGAINST.
        CAN-2004-0835:  Privilege escalation in ALTER TABLE RENAME.
        CAN-2004-0836:  Potential Memory Overrun With Compromised DNS Server.
        CAN-2004-0957:  Privilege Escalation on GRANT ALL ON `Foo\_Bar`
        CAN-2004-0837:  Concurrent accesses to MERGE tables can result in crash.

        Also, the mysqlhotcopy /tmp file handling fix from the last
        security update was broken.

    - Apache

        Several problems were found in the Apache web servers:

        CAN-2004-0885:  mod_ssl SSLCipherSuite bypass, where an attacker
                        could bypass a fixed list of ciphers and use a
                        less secure one.
        CAN-2004-0940:  mod_include local buffer overflow, where a local
                        attacker could execute code in the local apache
                        process if mod_include is enabled.
        CAN-2004-0942:  Fix of memory consumption denial of service attack
                        with HTTP continuation headers.

        We are in the process of releasing packages.

    - perl-MIME-Tools

        The perl-MIME-Tools are perl modules that do parsing of MIME
        E-mail bodies. These modules are used for instance by the
        amavisd-new and potentially other virus scanners.

        Due to an input error handling, some attachments can bypass
        the virus scanner.

    - tftp

        The tftp daemon had several buffer overflows, which could potentially
        be used by a remote attacker to gain local access.

    - xpdf

        We released xpdf buffer and integer overflow patches some weeks
        ago. We found that these fixes still have problems on 64 bit
        systems.

        Additional fixes were done by us and we are in the process of
        releasing updates, for xpdf, gpdf, pdftohtml, cups (which
        includes pdftops) and tetex (which also contains xpdf code).

    - xine-lib

        Several string based overflows were found in the XINE libraries.
        This is issue is tracked by the Xine security ID XSA-2004-4.

    - gd

        An integer overflow that might lead to a buffer overflow was
        found in the PNG image loader routines of the GD graphics library.

______________________________________________________________________________

2)  Pending vulnerabilities in SUSE Distributions and Workarounds:

    - kernel

        Several problems have been found in the Linux 2.4 and 2.6
        kernels:

        - Several overflow checks in the smbfs handling of both Linux
          2.4 and 2.6 were found missing by Stefan Esser.

        - Handcrafted a.out binaries could be used to trigger a local
          denial of service condition in both 2.4 and 2.6 Linux kernels.
          Fixes for this problem were done by Chris Wright.

        - A very small race window was found in the memory management of
          the kernel which could be used to show the content of random
          physical memory pages potentially leading to information
          disclosure.

        This bug affects all SUSE distributions.

        We are in the process of preparing updated packages.

______________________________________________________________________________

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@xxxxxxx),
       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@xxxxxxx" 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@xxxxxxxx
        -   general/linux/SUSE security discussion.
            All SUSE security announcements are sent to this list.
            To subscribe, send an email to
                <suse-security-subscribe@xxxxxxxx>.

    suse-security-announce@xxxxxxxx
        -   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@xxxxxxxx>.

    For general information or the frequently asked questions (FAQ)
    send mail to:
        <suse-security-info@xxxxxxxx> or
        <suse-security-faq@xxxxxxxx> respectively.

    =====================================================================
    SUSE's security contact is <security@xxxxxxxx> or <security@xxxxxxx>.
    The <security@xxxxxxx> 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@xxxxxxx>
pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@xxxxxxx>

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