leafnode Cross-Posted Article Group Name Prefix DoS

This script is Copyright (C) 2009-2011 Tenable Network Security, Inc.


Synopsis :

The remote NNTP server is vulnerable to a denial of service attack.

Description :

According to its version number, the remote Leafnode NNTP server is
vulnerable to a denial of service attack. Specifically, it may go
into an infinite loop with 100% CPU use when an article that has been
crossposted to several groups, one of which is the prefix of another,
and when this article is then requested by its Message-ID.

Note that Nessus did not actually test for the flaw but instead has
relied on the version in Leafnode's banner so this may be a false
positive.

See also :

http://leafnode.sourceforge.net/leafnode-SA-2002-01.txt

Solution :

Upgrade to 1.9.48 or later.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P)
CVSS Temporal Score : 4.3
(CVSS2#E:H/RL:OF/RC:C)
Public Exploit Available : true

Family: Misc.

Nessus Plugin ID: 42259 (leafnode_1_9_29.nasl)

Bugtraq ID: 6490

CVE ID: CVE-2002-1661