cve/2019/CVE-2019-11478.md

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://www.oracle.com/security-alerts/cpujan2020.html
• https://www.oracle.com/security-alerts/cpuoct2020.html

Github

• https://github.com/DevOps-spb-org/Linux-docs
• https://github.com/Ivan-778/docLinux
• https://github.com/hightemp/docLinux
• https://github.com/kaosagnt/ansible-everyday
• https://github.com/misanthropos/FFFFM