[RHSA-2004:091-01] Updated libxml2 packages fix security vulnerability

bugzilla_at_redhat.com
Date: 02/26/04

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                       Red Hat Security Advisory

    Synopsis: Updated libxml2 packages fix security vulnerability
    Advisory ID: RHSA-2004:091-01
    Issue date: 2004-02-26
    Updated on: 2004-02-26
    Product: Red Hat Linux
    Keywords:
    Cross references:
    Obsoletes:
    CVE Names: CAN-2004-0110
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    1. Topic:

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

    2. Relevant releases/architectures:

    Red Hat Linux 9 - 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.

    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 Red Hat Network. Many
    people find this an easier way to apply updates. To use Red Hat Network,
    launch the Red Hat Update Agent with the following command:

    up2date

    This will start an interactive process that will result in the appropriate
    RPMs being upgraded on your system.

    If up2date fails to connect to Red Hat Network due to SSL
    Certificate Errors, you need to install a version of the
    up2date client with an updated certificate. The latest version of
    up2date is available from the Red Hat FTP site and may also be
    downloaded directly from the RHN website:

    https://rhn.redhat.com/help/latest-up2date.pxt

    5. RPMs required:

    Red Hat Linux 9:

    SRPMS:
    ftp://updates.redhat.com/9/en/os/SRPMS/libxml2-2.5.4-2.src.rpm

    i386:
    ftp://updates.redhat.com/9/en/os/i386/libxml2-2.5.4-2.i386.rpm
    ftp://updates.redhat.com/9/en/os/i386/libxml2-devel-2.5.4-2.i386.rpm
    ftp://updates.redhat.com/9/en/os/i386/libxml2-python-2.5.4-2.i386.rpm

    6. Verification:

    MD5 sum Package Name
    - --------------------------------------------------------------------------

    7a1834ebc511ce8752dab9265ed0e3dd 9/en/os/SRPMS/libxml2-2.5.4-2.src.rpm
    f9663aacd4980f9e2805f90ea6f8fd93 9/en/os/i386/libxml2-2.5.4-2.i386.rpm
    ef2c2b5b8644ac165529a45d34029d3d 9/en/os/i386/libxml2-devel-2.5.4-2.i386.rpm
    1c269ed922321b3cce101408767de3ad 9/en/os/i386/libxml2-python-2.5.4-2.i386.rpm

    These packages are GPG signed by Red Hat for security. Our key is
    available from https://www.redhat.com/security/keys.html

    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 md5sum with the following command:
        
        md5sum <filename>

    7. References:

    http://mail.gnome.org/archives/xml/2004-February/msg00070.html
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0110

    8. Contact:

    The Red Hat security contact is <secalert@redhat.com>. More contact
    details at https://www.redhat.com/solutions/security/news/contact.html

    Copyright 2003 Red Hat, Inc.
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