6846 : MIT Kerberos 5 krb5_aname_to_localname() Buffer Overflow
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Timeline

Disclosure Date
2004-06-01

Description

A remote overflow exists in Kerberos 5. Kerberos fails to check the string length in the functions aname_replacer(), do_replacement() and rule_an_to_ln() resulting in a heap buffer overflow. With a specially crafted request, an attacker can gain remote access as root resulting in a loss of confidentiality, integrity, and/or availability. This vulnerability only exists when the software is used with a non-standard configuration. Please see the MIT release notes for the details.

Classification

Location: Remote / Network Access
Attack Type: Input Manipulation
Impact: Loss of Confidentiality, Loss of Integrity, Loss of Availability
Exploit: Exploit Unknown

Solution

Upgrade to Kerberos version 1.3.4 or higher, as it has been reported to fix this vulnerability. It is also possible to correct the flaw by implementing the patch provided in the original MIT advisory.

Products

MIT

Kerberos 5

1.3.3

Sun Microsystems, Inc.

SEAM

1.0.2

References

Security Tracker: 1010356
Bugtraq ID: 10448
Secunia Advisory ID: 11753 11851 11886 11973 12503
ISS X-Force ID: 16268
CVE ID: 2004-0523 (see also: NVD)
SCIP VulDB ID: 684
CERT VU: 686862
Other Advisory URL: http://distro.conectiva.com.br/atualizacoes/index.php?id=a&anuncio=000860
http://lists.debian.org/debian-security-announce/debian-security-announce-2004/msg00121.html
http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert/57580
http://www.gentoo.org/security/en/glsa/glsa-200406-21.xml
Vendor Specific Advisory URL: http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2004-001-an_to_ln.txt
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2004:056-1
http://www.redhat.com/archives/fedora-announce-list/2004-June/msg00006.html
http://www.redhat.com/archives/fedora-announce-list/2004-June/msg00007.html
http://www.tinysofa.org/support/errata/2004/009.html
http://www.trustix.net/errata/2004/0032/
CIAC Advisory: o-155
RedHat RHSA: RHSA-2004:236-01

Tools & Filters

	12502 13710 13711 14155 14532 15357
	2274

Credit

Christopher Nebergall -
Nico Williams -

CVSSv2 Score

CVSSv2 Base Score = 10.0
Source: nvd.nist.gov | Generated: 2003-12-31 | Disagree?

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