[b]0/udp
[/b]    11580 - Firewall UDP Packet Source Port 53 Ruleset Bypass     [-/+]
Synopsis
Firewall rulesets can be bypassed.
Description
It is possible to bypass the rules of the remote firewall by sending UDP packets with a source port equal to 53.

An attacker may use this flaw to inject UDP packets to the remote hosts, in spite of the presence of a firewall.
See Also
http://archives.neohapsis.com/archives/fulldisclosure/2003-q2/0352.html
http://www.nessus.org/u?4368bb37
Solution
Either contact the vendor for an update or review the firewall rules settings.
Risk Factor
High
CVSS Base Score
7.5 (CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)
CVSS Temporal Score
6.4 (CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)
References
BID     7436
BID     11237
CVE     CVE-2003-1491
CVE     CVE-2004-1473
XREF     OSVDB:10205
XREF     OSVDB:60212
XREF     CWE:94
XREF     CWE:16
Plugin Information:
Publication date: 2003/05/06, Modification date: 2014/05/26