[Full-disclosure] [FLSA-2005:162680] Updated Zlib packagea fix security issues

From: Marc Deslauriers (marcdeslauriers_at_videotron.ca)
Date: 09/15/05

  • Next message: Marc Deslauriers: "[Full-disclosure] [FLSA-2005:160202] Updated mozilla packages fix security issues" 
    Date: Wed, 14 Sep 2005 22:02:32 -0400
To: bugtraq@securityfocus.com, full-disclosure@lists.grok.org.uk

    ---------------------------------------------------------------------
                   Fedora Legacy Update Advisory

    Synopsis: Updated Zlib packagea fix security issues
    Advisory ID: FLSA:162680
    Issue date: 2005-09-14
    Product: Fedora Core
    Keywords: Bugfix
    CVE Names: CAN-2005-1849 CAN-2005-2096
    ---------------------------------------------------------------------

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

    Updated Zlib packages that fix buffer overflows are now available.

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

    2. Relevant releases/architectures:

    Fedora Core 1 - i386
    Fedora Core 2 - i386

    3. Problem description:

    Tavis Ormandy discovered a buffer overflow affecting Zlib version 1.2
    and above. An attacker could create a carefully crafted compressed
    stream that would cause an application to crash if the stream is opened
    by a user. As an example, an attacker could create a malicious PNG image
    file which would cause a web browser or mail viewer to crash if the
    image is viewed. The Common Vulnerabilities and Exposures project
    assigned the name CAN-2005-2096 to this issue.

    Markus Oberhumer discovered additional ways a stream could trigger an
    overflow. An attacker could create a carefully crafted compressed stream
    that would cause an application to crash if the stream is opened by a
    user. As an example, an attacker could create a malicious PNG image file
    that would cause a Web browser or mail viewer to crash if the image is
    viewed. The Common Vulnerabilities and Exposures project (cve.mitre.org)
    assigned the name CAN-2005-1849 to this issue.

    All users should update to these erratum packages which contain a patch
    from Mark Adler which corrects 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:

    https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=162680

    6. RPMs required:

    Fedora Core 1:

    SRPM:
    http://download.fedoralegacy.org/fedora/1/updates/SRPMS/zlib-1.2.0.7-2.3.legacy.src.rpm

    i386:
    http://download.fedoralegacy.org/fedora/1/updates/i386/zlib-1.2.0.7-2.3.legacy.i386.rpm
    http://download.fedoralegacy.org/fedora/1/updates/i386/zlib-devel-1.2.0.7-2.3.legacy.i386.rpm

    Fedora Core 2:

    SRPM:
    http://download.fedoralegacy.org/fedora/2/updates/SRPMS/zlib-1.2.1.2-0.fc2.2.legacy.src.rpm

    i386:
    http://download.fedoralegacy.org/fedora/2/updates/i386/zlib-1.2.1.2-0.fc2.2.legacy.i386.rpm
    http://download.fedoralegacy.org/fedora/2/updates/i386/zlib-devel-1.2.1.2-0.fc2.2.legacy.i386.rpm

    7. Verification:

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

    f242225e07d39648b0d7d6558150285ddf7f62d8
    fedora/1/updates/i386/zlib-1.2.0.7-2.3.legacy.i386.rpm
    618d744e5a8f9a895b40f952a8593985c93fd6d6
    fedora/1/updates/i386/zlib-devel-1.2.0.7-2.3.legacy.i386.rpm
    c812abcd0c5bcfccc86573e81d68ebff5b615ded
    fedora/1/updates/SRPMS/zlib-1.2.0.7-2.3.legacy.src.rpm
    d07c43de860f476302fcd1fc82d18db1835e1ba1
    fedora/2/updates/i386/zlib-1.2.1.2-0.fc2.2.legacy.i386.rpm
    f3326c134c6346ca8f120d86d28908ad45907bf9
    fedora/2/updates/i386/zlib-devel-1.2.1.2-0.fc2.2.legacy.i386.rpm
    2d288f7b2dd848a4c3f36d3ff7c200b9b629c868
    fedora/2/updates/SRPMS/zlib-1.2.1.2-0.fc2.2.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-2005-1849
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2096

    9. Contact:

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

    ---------------------------------------------------------------------

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