Bug 529652 – kernel: TCP Persist condition issue

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Bug 529652 - kernel: TCP Persist condition issue

Summary:	kernel: TCP Persist condition issue

Status:	CLOSED WONTFIX

Aliases:	None

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	high Severity high
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Assigned To:	Red Hat Product Security
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Keywords:	Security

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Reported:	2009-10-19 06:50 EDT by Eugene Teo (Security Response)
Modified:	2009-11-24 01:43 EST (History)
CC List:	2 users (show)

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Doc Type:	Bug Fix
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Last Closed:	2009-10-19 06:55:33 EDT
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Description Eugene Teo (Security Response) 2009-10-19 06:50:04 EDT

A denial of service flaw in the way TCP connections are maintained when receiving a zero byte receive window has been discussed. This flaw allows an attacker (the receiver) to consistently advertise a zero byte receive window, instructing the sender to maintain the TCP connection and probe the receiver until the receiver is ready to receive data. This is referred to as the TCP persist condition. This can cause the sender to consume system resources, eventually leading to a denial of service.

For more information, please see our knowledgebase article: http://kbase.redhat.com/faq/docs/DOC-21623

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