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F5 Networks: K26618426 (CVE-2019-11478): Linux SACK Slowness vulnerability CVE-2019-11478

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F5 Networks: K26618426 (CVE-2019-11478): Linux SACK Slowness vulnerability CVE-2019-11478

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
06/17/2019
Created
06/21/2019
Added
06/19/2019
Modified
09/16/2019

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)

  • f5-big-ip-upgrade-latest

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