[Full-Disclosure] [FLSA-2004:1207] Updated cvs resolves security vulnerability

From: Jesse Keating (jkeating_at_j2solutions.net)
Date: 01/29/04

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    To: fedora-legacy-announce-admin@redhat.com, bugtraq@securityfocus.com, full-disclosure@lists.netsys.com
Date: Wed, 28 Jan 2004 22:29:00 -0800

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                   Fedora Legacy Update Advisory

    Synopsis: Updated cvs resolves security vulnerability
    Advisory ID: FLSA:1207
    Issue date: 2004-01-28
    Product: Red Hat Linux
    Keywords: Security
    Cross references: https://bugzilla.fedora.us/show_bug.cgi?id=1207
    CVE Names: CAN-2003-0977
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    1. Topic:

    Updated cvs packages are now available that fix a security vulnerability
    which may allow cvs to attempt to create files and directories in the root
    file system, as well as prevent the cvsd from retaining root privileges
    after a user login.

    2. Relevant releases/architectures:

    Red Hat Linux 7.2 - i386
    Red Hat Linux 7.3 - i386
    Red Hat Linux 8.0 - i386

    3. Problem description:

    CVS (Concurrent Version System) is a version control system that can
    record the history of your files (usually, but not always, source
    code). CVS only stores the differences between versions, instead of
    every version of every file you have ever created. CVS also keeps a log
    of who, when, and why changes occurred.

    A flaw was found in versions of CVS prior to 1.11.10 where a malformed
    module request could cause the CVS server to attempt to create files or
    directories at the root level of the file system. However, normal file
    system permissions would prevent the creation of these misplaced
    directories. The Common Vulnerabilities and Exposures project
    (cve.mitre.org) has assigned the name CAN-2003-0977 to this issue.

    Another flaw was found that would allow the cvsd process to continue to run
    as root after a user login. Previously, any user with the ability to
    write the CVSROOT/passwd file could execute arbitrary code as the root
    user on systems with CVS pserver access enabled.

    Users of cvs should update to these update packages, which contain a
    backported security patch that corrects this issue.

    Fedora Legacy would like to thank Seth Vidal, Jason Rohwedder and Christian
    Pearce for providing a backported fix for Red Hat Linux 7.2, 7.3, and 8.0.

    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/download for directions on how to configure
    yum and apt-get.

    5. Bug IDs fixed:

    http://bugzilla.fedora.us - 1207 - cvs security patches

    6. RPMs required:

    Red Hat Linux 7.2:

    SRPMS:
    http://download.fedoralegacy.org/redhat/7.2/updates/SRPMS/cvs-1.11.1p1-9.7.legacy.src.rpm
    i386:
    http://download.fedoralegacy.org/redhat/7.2/updates/i386/cvs-1.11.1p1-9.7.legacy.i386.rpm

    Red Hat Linux 7.3:

    SRPMS:
    http://download.fedoralegacy.org/redhat/7.3/updates/SRPMS/cvs-1.11.1p1-9.7.legacy.src.rpm
    i386:
    http://download.fedoralegacy.org/redhat/7.3/updates/i386/cvs-1.11.1p1-9.7.legacy.i386.rpm

    Red Hat Linux 8.0:

    SRPMS:
    http://download.fedoralegacy.org/redhat/8.0/updates/SRPMS/cvs-1.11.2-9.legacy.src.rpm
    i386:
    http://download.fedoralegacy.org/redhat/8.0/updates/i386/cvs-1.11.2-9.legacy.i386.rpm

    7. Verification:

    SHA1 sum Package Name
    - ---------------------------------------------------------------------------
    46da2ca673b3af8a08eab8b1d4322e0d6a9d08ad
    7.2/updates/SRPMS/cvs-1.11.1p1-9.7.legacy.src.rpm
    469e08276fd61a06f816d4d7df68bc6c85a98560
    7.2/updates/i386/cvs-1.11.1p1-9.7.legacy.i386.rpm

    46da2ca673b3af8a08eab8b1d4322e0d6a9d08ad
    7.3/updates/SRPMS/cvs-1.11.1p1-9.7.legacy.src.rpm
    1dfba0ce740a20bd0977eede82f606ea2f907b00
    7.3/updates/i386/cvs-1.11.1p1-9.7.legacy.i386.rpm

    31e98f14255c132d3f548a51096b0c444a45797a
    8.0/updates/SRPMS/cvs-1.11.2-9.legacy.src.rpm
    e415df08fdfd35216c68651aa5214e7ecdb04268
    8.0/updates/i386/cvs-1.11.2-9.legacy.i386.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-2003-0977
    http://ccvs.cvshome.org/servlets/NewsItemView?newsID=88
    http://ccvs.cvshome.org/servlets/NewsItemView?newsID=84&JServSessionIdservlets=8u3x1myav1
    https://bugzilla.fedora.us/show_bug.cgi?id=1207

    9. Contact:

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

    - --
    Jesse Keating RHCE (http://geek.j2solutions.net)
    Fedora Legacy Team (http://www.fedoralegacy.org)
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