[Full-Disclosure] [FLSA-2004:1737] Updated httpd packages fix a mod_proxy security vulnerability

From: Marc Deslauriers (marcdeslauriers_at_videotron.ca)
Date: 10/14/04

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    To: "bugtraq@securityfocus.com" <bugtraq@securityfocus.com>, "full-disclosure@lists.netsys.com" <full-disclosure@lists.netsys.com>
Date: Wed, 13 Oct 2004 18:49:24 -0400

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                   Fedora Legacy Update Advisory

    Synopsis: Updated httpd packages fix a mod_proxy security
                       vulnerability
    Advisory ID: FLSA:1737
    Issue date: 2004-10-13
    Product: Red Hat Linux
    Keywords: Bugfix
    Cross references: https://bugzilla.fedora.us/show_bug.cgi?id=1737
    CVE Names: CAN-2004-0492
    -----------------------------------------------------------------------

    -----------------------------------------------------------------------
    1. Topic:

    Updated httpd packages that fix a security issue in the Apache Web
    server are now available.

    The Apache HTTP Server is a powerful, full-featured, efficient, and
    freely-available Web server.

    2. Relevant releases/architectures:

    Red Hat Linux 7.3 - i386

    3. Problem description:

    A buffer overflow was found in the Apache proxy module, mod_proxy, which
    can be triggered by receiving an invalid Content-Length header. In order
    to exploit this issue, an attacker would need an Apache installation
    that was configured as a proxy to connect to a malicious site. This
    would cause the Apache child processing the request to crash. The Common
    Vulnerabilities and Exposures project (cve.mitre.org) has assigned the
    name CAN-2004-0492 to this issue.

    All users of the Apache HTTP Server are advised to upgrade to these
    erratum 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 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 - bug #1737

    6. RPMs required:

    Red Hat Linux 7.3:

    SRPM:
    http://download.fedoralegacy.org/redhat/7.3/updates/SRPMS/apache-1.3.27-5.legacy.src.rpm

    i386:
    http://download.fedoralegacy.org/redhat/7.3/updates/i386/apache-1.3.27-5.legacy.i386.rpm
    http://download.fedoralegacy.org/redhat/7.3/updates/i386/apache-devel-1.3.27-5.legacy.i386.rpm
    http://download.fedoralegacy.org/redhat/7.3/updates/i386/apache-manual-1.3.27-5.legacy.i386.rpm

    7. Verification:

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

    2e1f8e6bafbbbe02ac26ccc98b73631e62c889ce
    7.3/updates/i386/apache-1.3.27-5.legacy.i386.rpm
    27a716974163c739784e09992f1d84a1996041d9
    7.3/updates/i386/apache-devel-1.3.27-5.legacy.i386.rpm
    ab688996e12f0364a50b58c2b120d933b403ce6b
    7.3/updates/i386/apache-manual-1.3.27-5.legacy.i386.rpm
    e2fadeb9a430a5dbda28076cd850180fbb95c2b8
    7.3/updates/SRPMS/apache-1.3.27-5.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://www.apacheweek.com/issues/04-06-11#security
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0492

    9. Contact:

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

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