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

Package 	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

    E-matters Advisory 09/2004
    CAN-2004-0414
    CAN-2004-0416
    CAN-2004-0417
    CAN-2004-0418