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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.


Home >> Browse Vulnerability Assessment Database >> Firewalls >> UDP packets with source port of 53 bypass firewall rules


Vulnerability Assessment Details

UDP packets with source port of 53 bypass firewall rules

Vulnerability Assessment Summary
By-passes the remote firewall rules

Detailed Explanation for this Vulnerability Assessment

It is possible to by-pass the rules of the remote firewall
by sending UDP packets with a source port equal to 53.

A possible hacker may use this flaw to inject UDP packets to the remote
hosts, in spite of the existence of a firewall.

Solution : Review your firewall rules policy
Network Security Threat Level: High

Networks Security ID: 7436, 11237

Vulnerability Assessment Copyright: This script is Copyright (C) 2003 Tenable Network Security

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