[FLSA-2004:1324] Updated libxml2 resolves security vulnerability

From: Marc Deslauriers (marcdeslauriers_at_videotron.ca)
Date: 10/04/04

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    Date: Mon, 04 Oct 2004 08:00:34 -0400
To: "bugtraq@securityfocus.com" <bugtraq@securityfocus.com>, "full-disclosure@lists.netsys.com" <full-disclosure@lists.netsys.com>

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                   Fedora Legacy Update Advisory

    Synopsis: Updated libxml2 resolves security vulnerability
    Advisory ID: FLSA:1324
    Issue date: 2004-10-04
    Product: Red Hat Linux
    Keywords: Security
    Cross references: https://bugzilla.fedora.us/show_bug.cgi?id=1324
    CVE Names: CAN-2004-0110
    -----------------------------------------------------------------------

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    1. Topic:

    [Updated 4th October 2004]
    The packages contained in the original release of this advisory were
    missing python 2.2 support. These updated packages restore the missing
    functionality.

    Updated libxml2 packages that fix an overflow when parsing remote
    resources are now available.

    2. Relevant releases/architectures:

    Red Hat Linux 7.3 - i386

    3. Problem description:

    libxml2 is a library for manipulating XML files.

    Yuuichi Teranishi discovered a flaw in libxml2 versions prior to 2.6.6.
    When fetching a remote resource via FTP or HTTP, libxml2 uses special
    parsing routines. These routines can overflow a buffer if passed a very
    long URL. If an attacker is able to find an application using libxml2
    that parses remote resources and allows them to influence the URL, then
    this flaw could be used to execute arbitrary code. The Common
    Vulnerabilities and Exposures project (cve.mitre.org) has assigned the
    name CAN-2004-0110 to this issue.

    All users are advised to upgrade to these updated packages, which
    contain a backported fix and are not vulnerable to this issue.

    Fedora Legacy would like to thank Johnny Strom for reporting this issue.

    4. Solution:

    Before applying this update, make sure all previously released errata
    relevant to your system have been applied.

    To update all RPMs for your particular architecture, run:

    rpm -Fvh [filenames]

    where [filenames] is a list of the RPMs you wish to upgrade. Only those
    RPMs which are currently installed will be updated. Those RPMs which
    are not installed but included in the list will not be updated. Note
    that you can also use wildcards (*.rpm) if your current directory *only*
    contains the desired RPMs.

    Please note that this update is also available via yum and apt. Many
    people find this an easier way to apply updates. To use yum issue:

    yum update

    or to use apt:

    apt-get update; apt-get upgrade

    This will start an interactive process that will result in the
    appropriate RPMs being upgraded on your system. This assumes that you
    have yum or apt-get configured for obtaining Fedora Legacy content.
    Please visit http://www fedoralegacy.org/docs for directions on how to
    configure yum and apt-get.

    5. Bug IDs fixed:

    http://bugzilla.fedora.us - 1324 - libxml2: an overflow when parsing
    remote resources.

    6. RPMs required:

    Red Hat Linux 7.3:

    SRPM:
    http://download.fedoralegacy.org/redhat/7.3/updates/SRPMS/libxml2-2.4.19-6.legacy.src.rpm

    i386:
    http://download.fedoralegacy.org/redhat/7.3/updates/i386/libxml2-2.4.19-6.legacy.i386.rpm
    http://download.fedoralegacy.org/redhat/7.3/updates/i386/libxml2-python-2.4.19-6.legacy.i386.rpm
    http://download.fedoralegacy.org/redhat/7.3/updates/i386/libxml2-devel-2.4.19-6.legacy.i386.rpm

    7. Verification:

    SHA1 sum Package Name
    ---------------------------------------------------------------------------

    41e9e0daaf643f9d3ec96cbba7b050a397d1907e
    7.3/updates/i386/libxml2-2.4.19-6.legacy.i386.rpm
    130e6e03b76891959e58a3ddd56bc99777d76981
    7.3/updates/i386/libxml2-devel-2.4.19-6.legacy.i386.rpm
    42087ae0d2e5ee16c4ecf32478991d96ce0500cb
    7.3/updates/i386/libxml2-python-2.4.19-6.legacy.i386.rpm
    8a1d844bfb9494c00bd4a6dd2d95a0829daf9f42
    7.3/updates/SRPMS/libxml2-2.4.19-6.legacy.src.rpm

    These packages are GPG signed by Fedora Legacy for security. Our key is
    available from http://www.fedoralegacy org/about/security.php

    You can verify each package with the following command:

        rpm --checksig -v <filename>

    If you only wish to verify that each package has not been corrupted or
    tampered with, examine only the sha1sum with the following command:

        sha1sum <filename>

    8. References:

    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0110
    https://www.redhat.com/archives/redhat-watch-list/2004-February/msg00007.html
    http://mail.gnome.org/archives/xml/2004-February/msg00070.html

    9. Contact:

    The Fedora Legacy security contact is <secnotice@fedoralegacy.org>. More
    project details at http://www.fedoralegacy.org

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