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Red Hat OpenShift: CVE-2019-11478: Kernel: tcp: excessive resource consumption while processing SACK blocks allows remote denial of service

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Red Hat OpenShift: CVE-2019-11478: Kernel: tcp: excessive resource consumption while processing SACK blocks allows remote denial of service

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
06/19/2019
Created
12/30/2020
Added
12/29/2020
Modified
12/29/2020

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.

Solution(s)

  • linuxrpm-upgrade-redhat-coreos

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