[Full-Disclosure] [FLSA-2005:2272] Updated unarj package fixes security issue

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

  • Next message: Marc Deslauriers: "[Full-Disclosure] [FLSA-2005:2255] Updated zip package fixes security issue"
    Date: Tue, 01 Feb 2005 20:16:20 -0500
    To: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com

                    Fedora Legacy Update Advisory

    Synopsis: Updated unarj package fixes security issue
    Advisory ID: FLSA:2272
    Issue date: 2005-02-01
    Product: Red Hat Linux, Fedora Core
    Keywords: Bugfix
    Cross references: https://bugzilla.fedora.us/show_bug.cgi?id=2272
    CVE Names: CAN-2004-0947 CAN-2004-1027

    1. Topic:

    An updated unarj package that fixes a buffer overflow vulnerability and
    a directory traversal vulnerability is now available.

    The unarj program is an archiving utility which can extract
    ARJ-compatible archives.

    2. Relevant releases/architectures:

    Red Hat Linux 7.3 - i386
    Red Hat Linux 9 - i386
    Fedora Core 1 - i386

    3. Problem description:

    A buffer overflow bug was discovered in unarj when handling long file
    names contained in an archive. An attacker could create a specially
    crafted archive which could cause unarj to crash or possibly execute
    arbitrary code when extracted by a victim. The Common Vulnerabilities
    and Exposures project (cve.mitre.org) has assigned the name
    CAN-2004-0947 to this issue.

    Additionally, a path traversal vulnerability was discovered in unarj. An
    attacker could create a specially crafted archive which would create
    files in the parent ("..") directory when extracted by a victim. When
    used recursively, this vulnerability could be used to overwrite critical
    system files and programs. The Common Vulnerabilities and Exposures
    project (cve.mitre.org) has assigned the name CAN-2004-1027 to this

    Users of unarj should upgrade to this updated package which contains
    backported patches and is not vulnerable to these issues.

    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 #2272 - unarj - buffer overflow and path
    traversal bugs

    6. RPMs required:

    Red Hat Linux 7.3:



    Red Hat Linux 9:



    Fedora Core 1:



    7. Verification:

    SHA1 sum Package Name


    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:


    9. Contact:

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




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