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Test ID:
Category:Denial of Service
Title:AVM FRITZ!Box TCP SACK PANIC - Kernel Vulnerabilities
Summary:Multiple AVM FRITZ!Box devices are prone to multiple Denial of Service; vulnerabilities.
Multiple AVM FRITZ!Box devices are prone to multiple Denial of Service

Vulnerability Insight:
Three related flaws were found in the Linux kernel's handling of TCP Selective
Acknowledgement (SACK) packets handling with low MSS size.

Vulnerability Impact:
The extent of impact is understood to be limited to denial of service at this
time. No privilege escalation or information leak is currently suspected

Affected Software/OS:
AVM FRITZ!Box devices running AVM FRITZ!OS before version 7.12.

Update to AVM FRITZ!OS 7.12 or later.

CVSS Score:

CVSS Vector:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2019-11477
Common Vulnerability Exposure (CVE) ID: CVE-2019-11478
Common Vulnerability Exposure (CVE) ID: CVE-2019-11479
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