Fritz!Box 7050 UDP packet denial of service

fritzbox-udp-packet-dos (31633)

Medium Risk

Description:

AVM Fritz!Box 7050 and possibly other models are vulnerable to a denial of service caused by an error in handling UDP packets. A remote attacker could send a zero-length UDP packet to port 5060 to cause the VOIP application to crash.

*CVSS:

Base Score:	5
Access Vector:	Remote
Access Complexity:	Low
Authentication:	Not Required
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Complete
Temporal Score:	4.3
Exploitability:	Proof-Of-Concept
Remediation Level:	Unavailable
Report Confidence:	Uncorroborated

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of Fritz!Box, available from the AVM Web site. See References.

References:

• AVM Web site: FRITZ!Box Fon WLAN.
• maZZoo's blog 18 01 2007: Fritz!Box 7050 (and others) DoS.
• BID-22130: AVM FRITZ!Box VoIP Remote Denial of Service Vulnerability
• CVE-2007-0431: AVM Fritz!Box 7050, and possibly other product models, allows remote attackers to cause a denial of service (VoIP application crash) via a zero-length UDP packet to the SIP port (port 5060).
• SA23868: Fritz!Box UDP Packet SIP Denial of Service
• VUPEN/ADV-2007-0272: AVM Fritz!Box SIP Service UDP Packet Handling Remote Denial of Service Vulnerability

Platforms Affected:

• AVM Fritz!Box 7050

Reported:

Jan 18, 2007

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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