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TITLE:
Kerberos SPNEGO Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA39010

VERIFY ADVISORY:
http://secunia.com/advisories/39010/

DESCRIPTION:
A vulnerability has been reported in Kerberos, which can be exploited
by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an assertion error within the
"spnego_gss_accept_sec_context()" function in
src/lib/gssapi/spnego/spnego_mech.c when receiving an invalid packet,
which can be exploited to e.g. crash an application using the library
by sending a specially crafted packet.

The vulnerability is reported in version 1.7 and later prior to 1.7.2
and 1.8.1.

SOLUTION:
Update to version 1.7.2 and 1.8.1 as soon as available or apply
patch.

Patch:
http://web.mit.edu/kerberos/advisories/2010-002-patch.txt.asc

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Nalin Dahyabhai, Jan iankko Lieskovsky, and Zbysek
Mraz from Red Hat.

ORIGINAL ADVISORY:
MIT krb5 Security Advisory 2010-002:
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2010-002.txt

OTHER REFERENCES:
US-CERT VU#839413:
http://www.kb.cert.org/vuls/id/839413

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Secunia NEVER sends attached files with advisories.
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