[FLSA-2005:2043] Updated zlib package fixes security issues

From: Marc Deslauriers (marcdeslauriers_at_videotron.ca)
Date: 02/24/05

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    Date: Wed, 23 Feb 2005 22:55:29 -0500
To: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com

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                    Fedora Legacy Update Advisory

    Synopsis: Updated zlib package fixes security issues
    Advisory ID: FLSA:2043
    Issue date: 2005-02-23
    Product: Fedora Core
    Keywords: Bugfix
    Cross references: https://bugzilla.fedora.us/show_bug.cgi?id=2043
    CVE Names: CAN-2004-0797
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    1. Topic:

    An updated zlib package that fixes a security flaw is now available.

    Zlib is a general-purpose, patent-free, lossless data compression
    library which is used by many different programs.

    2. Relevant releases/architectures:

    Fedora Core 1 - i386

    3. Problem description:

    Johan Thelmen reported that a specially crafted file can cause a
    segmentation fault in zlib as the inflate() and inflateBack() functions
    do not properly handle errors. An attacker could construct a carefully
    crafted file that could cause a crash or possibly execute arbitrary code
    when opened. The specific impact depends on the application using zlib.
    The Common Vulnerabilities and Exposures project (cve.mitre.org) has
    assigned the name CAN-2004-0797 to this issue.

    Users of zlib are advised to upgrade to this errata package, which
    contains a backported patch correcting 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 #2043 - Zlib Compression Library Denial
    Of Service Vulnerability

    6. RPMs required:

    Fedora Core 1:

    SRPM:
    http://download.fedoralegacy.org/fedora/1/updates/SRPMS/zlib-1.2.0.7-2.1.legacy.src.rpm

    i386:
    http://download.fedoralegacy.org/fedora/1/updates/i386/zlib-1.2.0.7-2.1.legacy.i386.rpm
    http://download.fedoralegacy.org/fedora/1/updates/i386/zlib-devel-1.2.0.7-2.1.legacy.i386.rpm

    7. Verification:

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

    815ce5cc7d77184e8075d7b81f16ae94f620ffea
    fedora/1/updates/i386/zlib-1.2.0.7-2.1.legacy.i386.rpm
    e7364e589e0a06615c3a02235e54619ca58d0997
    fedora/1/updates/i386/zlib-devel-1.2.0.7-2.1.legacy.i386.rpm
    4013ab1384694342ed5083f843c2b78d1f4082a7
    fedora/1/updates/SRPMS/zlib-1.2.0.7-2.1.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-2004-0797

    9. Contact:

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

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