Red Hat: cvs Denial of service vulnerabilities
Summary
Summary
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.
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
for directions on how to configure yum
and apt-get.
5. Bug IDs fixed:
- 1620 - Security problems found with CVS that
need to be fixed.
6. RPMs required:
Red Hat Linux 7.3:
SRPM:
i386:
Red Hat Linux 9:
SRPM:
i386:
7. Verification:
SHA1 sum Package Name
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 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
References
CVE -CVE-2004-0180 CVE -CVE-2004-0396 CVE -CVE-2004-0405 https://access.redhat.com/errata/RHSA-2004:153.html https://access.redhat.com/errata/RHSA-2004:190.html
Package List
Topic
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
Relevant Releases Architectures
Bugs Fixed
