Debian Security Advisory

DSA-715-1 cvs -- several vulnerabilities

Date Reported:

27 Apr 2005

Affected Packages:

cvs

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 260200.
In Mitre's CVE dictionary: CAN-2004-1342, CAN-2004-1343.

More information:

Several problems have been discovered in the CVS server, which serves the popular Concurrent Versions System. The Common Vulnerability and Exposures project identifies the following problems:

CAN-2004-1342
Maks Polunin and Alberto Garcia discovered independently that using the pserver access method in connection with the repouid patch that Debian uses it is possible to bypass the password and gain access to the repository in question.
CAN-2004-1343
Alberto Garcia discovered that a remote user can cause the cvs server to crash when the cvs-repouids file exists but does not contain a mapping for the current repository, which can be used as a denial of service attack.

For the stable distribution (woody) these problems have been fixed in version 1.11.1p1debian-10.

For the unstable distribution (sid) these problems have been fixed in version 1.12.9-12.

We recommend that you upgrade your cvs package.

Fixed in:

Debian GNU/Linux 3.0 (woody)

Source:: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-10.dsc; http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-10.diff.gz; http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian.orig.tar.gz
Alpha:: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-10_alpha.deb
ARM:: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-10_arm.deb
Intel IA-32:: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-10_i386.deb
Intel IA-64:: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-10_ia64.deb
HPPA:: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-10_hppa.deb
Motorola 680x0:: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-10_m68k.deb
Big endian MIPS:: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-10_mips.deb
Little endian MIPS:: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-10_mipsel.deb
PowerPC:: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-10_powerpc.deb
IBM S/390:: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-10_s390.deb
Sun Sparc:: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-10_sparc.deb

MD5 checksums of the listed files are available in the original advisory.


PROBLEM:	Vulnerabilities have been found in CVS (Concurrent Versions System) server.
PLATFORM:	Debian GNU/Linux 3.0 (woody)
DAMAGE:	Using the pserver access method in connection with the repouid patch that Debian uses it is possible to bypass the password and gain access to the CVS repository. Also a vulnerability that may lead to a denial of service was discovered.
SOLUTION:	Apply available security updates.

VULNERABILITY ASSESSMENT:	The risk is LOW. Exploiting this vulnerability may lead to unauthorized disclosure of information.

LINKS:
CIAC BULLETIN:	http://www.ciac.org/ciac/bulletins/p-195.shtml
ORIGINAL BULLETIN:	http://www.debian.org/security/2005/dsa-715
CVE/CAN:	http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CAN-2004-1342, CAN-2004-1343

INFORMATION BULLETIN

P-195: CVS Vulnerabilities