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Fedora Legacy Update Advisory
Synopsis: Updated cvs resolves security vulnerability
Advisory ID: FLSA:1620
Issue date: 2004-06-02
Product: Red Hat Linux
Keywords: Security
Cross references: https://bugzilla.fedora.us/show_bug.cgi?id=1620
CVE Names: CAN-2004-0180 CAN-2004-0396 CAN-2004-0405
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1. Topic:
Updated cvs packages that fix remote denial of service vulnerabilities are
now available.
2. Relevent releases/architectures:
Red Hat Linux 7.3 - i386
Red Hat Linux 9 - i386
3. Problem description:
Sebastian Krahmer discovered a flaw in CVS clients where rcs diff files can
create files with absolute pathnames An attacker could create a fake
malicious CVS server that would cause arbitrary files to be created or
overwritten when a victim connects to it. The Common Vulnerabilities and
Exposures project (cve.mitre.org) has assigned the name CAN-2004-0180 to
this issue. (Note: Red Hat Linux 9 was already patched for this issue)
Derek Price discovered a vulnerability whereby a CVS pserver could be
abused by a malicious client to view the contents of certain files outside
of the CVS root directory using relative pathnames containing "../". The
Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned
the name CAN-2004-0405 to this issue. (Note: Red Hat Linux 9 was already
patched for this issue)
Stefan Esser discovered a flaw in cvs where malformed "Entry" lines could
cause a heap overflow. An attacker who has access to a CVS server could
use this flaw to execute arbitrary code under the UID which the CVS server
is executing. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2004-0396 to this issue.
Users of CVS are advised to upgrade to these erratum packages, which
contain a patch correcting this issue.
Fedora Legacy would like to thank David M. Kaplan for bringing these issues
to our attention.
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 - 1620 - Security problems found with CVS that
need to be fixed.
6. RPMs required:
Red Hat Linux 7.3:
SRPM:
http://download.fedoralegacy.org/redhat/7.3/updates/SRPMS/cvs-1.11.1p1-14.legacy.3.src.rpm
i386:
http://download.fedoralegacy.org/redhat/7.3/updates/i386/cvs-1.11.1p1-14.legacy.3.i386.rpm
Red Hat Linux 9:
SRPM:
http://download.fedoralegacy.org/redhat/9/updates/SRPMS/cvs-1.11.2-23.legacy.src.rpm
i386:
http://download.fedoralegacy.org/redhat/9/updates/i386/cvs-1.11.2-23.legacy.i386.rpm
7. Verification:
SHA1 sum Package Name
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58069558fc24abfa50f2ac94327c8d06f234bbd9
7.3/updates/SRPMS/cvs-1.11.1p1-14.legacy.3.src.rpm
523e9f69536d69ae5a8984f4327e35b32c38afdc
7.3/updates/i386/cvs-1.11.1p1-14.legacy.3.i386.rpm
84027d8b84f72c675aeb15816034e86450534b62
9/updates/SRPMS/cvs-1.11.2-23.legacy.src.rpm
e79bb82a8dca7a50cf51a72a85879bdbfa0b338d
9/updates/i386/cvs-1.11.2-23.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-2004-0180
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0396
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0405
http://rhn.redhat.com/errata/RHSA-2004-153.html
http://rhn.redhat.com/errata/RHSA-2004-190.html
http://rhn.redhat.com/errata/RHSA-2004-154.html
https://bugzilla.fedora.us/show_bug.cgi?id=1620
9. Contact:
The Fedora Legacy security contact is <secnotice@xxxxxxxxxxxxxxxx>. More
project details at http://www.fedoralegacy.org
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