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Home >> Browse Vulnerability Assessment Database >> Firewalls >> Remote host replies to SYN+FIN


Vulnerability Assessment Details

Remote host replies to SYN+FIN

Vulnerability Assessment Summary
Sends a SYN+FIN packet and expects a SYN+ACK

Detailed Explanation for this Vulnerability Assessment

Summary :

It may be possible to bypass firewall rules

Description :

The remote host does not discard TCP SYN packets which have
the FIN flag set.

Depending on the kind of firewall you are using, a possible hacker
may use this flaw to bypass its rules.

See also :

http://archives.neohapsis.com/archives/bugtraq/2002-10/0266.html
http://www.kb.cert.org/vuls/id/464113

Solution :

Contact your vendor for a patch

Network Security Threat Level:

None / CVSS Base Score : 0
(AV:R/AC:L/Au:NR/C:N/A:N/I:N/B:N)

Networks Security ID: 7487

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

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