CVS: additional DoS and arbitrary code execution vulnerabilities — GLSA 200406-06

Several serious new vulnerabilities have been found in CVS, which may allow an attacker to remotely compromise a CVS server.

Affected Packages

dev-util/cvs on all architectures
Affected versions <= 1.11.16-r1
Unaffected versions >= 1.11.17

Background

CVS (Concurrent Versions System) is an open-source network-transparent version control system. It contains both a client utility and a server.

Description

A team audit of the CVS source code performed by Stefan Esser and Sebastian Krahmer resulted in the discovery of several remotely exploitable vulnerabilities including:

  • no-null-termination of "Entry" lines
  • error_prog_name "double-free()"
  • Argument integer overflow
  • serve_notify() out of bounds writes

Impact

An attacker could use these vulnerabilities to cause a Denial of Service or execute arbitrary code with the permissions of the user running cvs.

Workaround

There is no known workaround at this time. All users are advised to upgrade to the latest available version of CVS.

Resolution

All CVS users should upgrade to the latest stable version:

 # emerge sync

 # emerge -pv ">=dev-util/cvs-1.11.17"
 # emerge ">=dev-util/cvs-1.11.17"

References

Release Date
June 10, 2004

Latest Revision
June 10, 2004: 01

Severity
high

Exploitable
remote

Bugzilla entries