Bug 4511 – IPChains Security Hole

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Bug 4511 - IPChains Security Hole

Summary:	IPChains Security Hole

Status:	CLOSED CURRENTRELEASE

Aliases:	None

Product:	Red Hat Linux
Classification:	Retired
Component:	kernel (Show other bugs)
Sub Component:
Version:	6.0
Hardware:	All Linux

Priority	high Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Cristian Gafton
QA Contact:
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Keywords:	Security

Depends On:
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Reported:	1999-08-13 10:41 EDT by pjmattal
Modified:	2008-08-01 12:22 EDT (History)
CC List:	0 users

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Doc Type:	Bug Fix
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Description pjmattal 1999-08-13 10:41:59 EDT

There is a recent security hole in the ipchains IP
forwarding mechanism that can allow arbitrary packets
through the ipchains filters if a fragment overlap tactic is
used to rewrite the address in the header. A "fragrouter"
exploit has been written which makes it particularly easy
for hackers to exploit this hole.

The patch has been incorporated into the Linux 2.2.11 kernel
as blessed/released by Linus on August 9, 1999. This kernel
(or, marginally, a patched version of the 2.2.5 kernel)
should be packaged and released ASAP!

For more information, visit:

http://www.securityfocus.com/vdb/bottom.html?vid=543

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