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CVE-2019-11478

Description

Jonathan Looney discovered that the TCP retransmission queue implementation in tcp_fragment in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commit f070ef2ac66716357066b683fb0baf55f8191a2e.

POC

Reference

- http://packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSN-0052-1.html

- http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html

- http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html

- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193

- https://kc.mcafee.com/corporate/index?page=content&id=SB10287

- https://www.oracle.com/security-alerts/cpujan2020.html

- https://www.oracle.com/security-alerts/cpuoct2020.html

Github

- https://github.com/ARPSyndicate/cve-scores

- https://github.com/DevOps-spb-org/Linux-docs

- https://github.com/Ivan-778/docLinux

- https://github.com/Skrypnykov/Linux-docs

- https://github.com/hightemp/docLinux

- https://github.com/kaosagnt/ansible-everyday

- https://github.com/misanthropos/FFFFM