Bug 529652 - kernel: TCP Persist condition issue
Summary: kernel: TCP Persist condition issue
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2009-10-19 10:50 UTC by Eugene Teo (Security Response)
Modified: 2009-11-24 06:43 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2009-10-19 10:55:33 UTC
Embargoed:


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Description Eugene Teo (Security Response) 2009-10-19 10:50:04 UTC
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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