BNC IRC getnickuserhost function buffer overflow
| bnc-irc-getnickuserhost-bo (18013) |  High Risk |
Description:
BNC is vulnerable to a buffer overflow, caused by improper bounds checking of user-supplied input in the getnickuserhost function in the cmds.c file when processing IRC server responses. A remote attacker could use this vulnerability to overflow a buffer and execute arbitrary code on the system or cause a denial of service.
Platforms Affected:
- Debian, Debian Linux 3.0
- Gentoo, Linux
- James Seter, BNC Proxy 2.8.9
Remedy:
Upgrade to the latest version of BNC IRC (2.9.1 or later), available from the IRC Proxy Download Web page. See References.
For Gentoo Linux:
Upgrade to the latest version of BNC (2.9.1 or later), as listed in GLSA 200411-24. See References.
For Debian GNU/Linux 3.0 (alias woody):
Upgrade to the latest BNC package (2.6.4-3.3 or later), as listed in DSA-595-1. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Gain Access
References:
- BNC IRC Web page, The IRC proxy at http://www.gotbnc.com/index.html.
- IRC Proxy Download Web page, Download at http://www.gotbnc.com/download.html.
- LSS Security Advisory #LSS-2004-11-03, BNC 2.8.9 remote buffer overflow at http://security.lss.hr/en/index.php?page=details&ID=LSS-2004-11-03.
- BID-11647: BNC getnickuserhost IRC Server Response Buffer Overflow Vulnerability
- CVE-2004-1052: Buffer overflow in the getnickuserhost function in BNC 2.8.9, and possibly other versions, allows remote IRC servers to execute arbitrary code via an IRC server response that contains many (1) ! (exclamation) or (2) @ (at sign) characters.
- DSA-595: bnc -- buffer overflow
- GLSA-200411-24: BNC: Buffer overflow vulnerability
- SA13149: BNC IRC proxy "getnickuserhost()" Buffer Overflow Vulnerability
Reported:
Nov 09, 2004
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