Fedora Legacy alert: Updated cvs resolves security vulnerability

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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
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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 

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 

8. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=