From: Secunia Security Advisories (sec-advsecunia.com)
Date: Mon May 21 2007 - 10:32:04 CDT

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TITLE:
Packeteer PacketShaper TCP ISN Generation Weakness

SECUNIA ADVISORY ID:
SA25344

VERIFY ADVISORY:
http://secunia.com/advisories/25344/

CRITICAL:
Not critical

IMPACT:
Spoofing

WHERE:
From local network

OPERATING SYSTEM:
PacketWise 7.x
http://secunia.com/product/7652/

DESCRIPTION:
nnposter has reported a weakness in Packeteer PacketShaper, which can
be exploited by malicious people to spoof TCP connections.

The problem is that TCP ISNs (Initial Sequence Numbers) are generated
in a predictable way and can be exploited to spoof TCP connections.

The weakness is reported in versions 7.3.0g2 and 7.5.0g1. Other
versions may also be affected.

SOLUTION:
Restrict network access to the device management interfaces.

PROVIDED AND/OR DISCOVERED BY:
nnposter

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