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>> OpenAFS "GiveUpAllCallBacks" Handler Denial of Service Vulnerability

Title : OpenAFS "GiveUpAllCallBacks" Handler Denial of Service Vulnerability
VUPEN ID : VUPEN/ADV-2008-0046
CVE ID : CVE-2007-6599
Rated as : Moderate Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2008-01-07


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format 

A vulnerability has been identified in OpenAFS, which could be exploited by attackers to cause a denial of service. This issue is caused by a race condition within the "GiveUpAllCallBacks" RPC handler when simultaneously acquiring and giving back file callbacks, which could be exploited by attackers to crash a vulnerable server, creating a denial of service condition.

Affected Products

OpenAFS versions 1.3.x
OpenAFS versions 1.4.x
OpenAFS versions 1.5.x

Solution

Upgrade to OpenAFS version 1.4.5 or 1.5.27 :
http://www.openafs.org/release/latest.html

References

http://www.vupen.com/english/advisories/2008/0046
http://www.openafs.org/pages/security/OPENAFS-SA-2007-003.txt

Credits

Vulnerability reported by Russ Allbery, Jeffrey Altman, Dan Hyde and Thomas Mueller.

ChangeLog

2008-01-07 : Initial release

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