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Secunia Advisory SA23868

Fritz!Box UDP Packet SIP Denial of Service
Secunia Advisory SA23868
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Release Date 2007-01-22
Last Update 2007-01-24
   
Popularity 9,639 views
Comments 0 comments

Criticality level Moderately criticalModerately critical
Impact DoS
Where From remote
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Vendor Patch
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
   
Operating System
AVM Fritz!Box 7050
Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2007-0431 CVSS available in Customer Area
  

Description

Matthias Wenzel has reported a vulnerability in AVM Fritz!Box 7050, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error within the handling of certain UDP packets. This can be exploited to crash the VoIP application by sending a UDP packet with size 0 to the SIP Port (5060/UDP).


Solution
Apply latest firmware update.
Further details available in Customer Area

Provided and/or discovered by
Matthias Wenzel

Changelog
Further details available in Customer Area

Original Advisory
http://mazzoo.de/blog/2007/01/18#FritzBox_DoS

Deep Links
Links available in Customer Area


Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Fritz!Box UDP Packet SIP Denial of Service
 
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