A vulnerability in BIND, repaired in verison 8.2.2p5, allows remote attackers to execute code with the privileges of the process running named. This vulnerability was widely exploited from November 1999 to December 2000.
There is a buffer overflow in the processing of NXT records in the routine rrextract, part of the file ns_resp.c. Specifically, in vulnerable versions of BIND, there is a section of code which reads:
An exploit for this vulnerability is publicly available .
Remote user may gain default process access of local nameserver, usually root
Upgrade to the latest version of BIND.
The SCO Group (SCO Unix)
Sun Microsystems, Inc.
Compaq Computer Corporation
Our thanks to ISC for assistance in understanding this vulnerability.
This document was written by Shawn V Hernan.