Nessus NASL split() denial of service
| nessus-nasl-split-dos (26034) |  Low Risk |
Description:
Nessus is vulnerable to a denial of service, caused by a vulnerability in the Nessus Attack Scripting Language (NASL) split() function. A local attacker with permissions to execute NASL scripts could exploit this vulnerability by loading a malicious plugin in nessusd to cause the consumption of all available CPU and memory resources, resulting in a denial of service.
Consequences:
Denial of Service
Remedy:
Upgrade to the latest version of Nessus (2.2.8 / 3.0.3 or later), available from the Nessus Web site. See References.
References:
- BugTraq Mailing List, Tue Apr 25 2006 - 02:51:15 CDT: NASL 'Split' function Buffer overflow Vulnerability.
- BugTraq Mailing List, Tue Apr 25 2006 - 12:09:28 CDT: Re: NASL 'Split' function Buffer overflow Vulnerability.
- Nessus Web site: Nessus.
- CVE-2006-2093: Nessus before 2.2.8, and 3.x before 3.0.3, allows user-assisted attackers to cause a denial of service (memory consumption) via a NASL script that calls split with an invalid sep parameter. NOTE: a design goal of the NASL language is to facilitate sharing of security tests by guaranteeing that a script can not do anything nasty. This issue is appropriate for CVE only if Nessus users have an expectation that a split statement will not use excessive memory.
- OSVDB ID: 25084: Nessus NASL Processing split Function Remote Overflow DoS
- SECTRACK ID: 1015996: Nessus libnasl split() Function Buffer Overflow May Let Authorized Users Deny Service
- USN-279-1: libnasl/nessus vulnerability
- VUPEN/ADV-2006-1541: Nessus Attack Scripting Language (NASL) Handling Denial of Service Vulnerability
Platforms Affected:
- Canonical Ubuntu 5.04
- Canonical Ubuntu 5.10
- Tenable Network Security Nessus 2.2.7 and prior
- Tenable Network Security Nessus 3.0.2 and prior
Reported:
Apr 25, 2006
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
For corrections or additions please email xforce@iss.net