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AVM FRITZ!Box TCP SACK PANIC - Kernel Vulnerabilities
Information
Severity
Severity
High
Family
Family
Denial of Service
CVSSv2 Base
CVSSv2 Base
7.8
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:N/C:N/I:N/A:C
Solution Type
Solution Type
Vendor Patch
Created
Created
3 years ago
Modified
Modified
3 years ago
Summary
Multiple AVM FRITZ!Box devices are prone to multiple Denial of Service vulnerabilities.
Insight
Insight
Three related flaws were found in the Linux kernel's handling of TCP Selective Acknowledgement (SACK) packets handling with low MSS size.
Affected Software
Affected Software
AVM FRITZ!Box devices running AVM FRITZ!OS before version 7.12.
Detection Method
Detection Method
Check the AVM FRITZ!OS version.
Solution
Solution
Update to AVM FRITZ!OS 7.12 or later.