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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

2 years ago

Modified

Modified

2 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.

Common Vulnerabilities and Exposures (CVE)