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F5 Networks: K32380005: Linux kernel vulnerability CVE-2019-18282

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F5 Networks: K32380005: Linux kernel vulnerability CVE-2019-18282

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
01/16/2020
Created
03/11/2021
Added
03/09/2021
Modified
02/18/2022

Description

The flow_dissector feature in the Linux kernel 4.3 through 5.x before 5.3.10 has a device tracking vulnerability, aka CID-55667441c84f. This occurs because the auto flowlabel of a UDP IPv6 packet relies on a 32-bit hashrnd value as a secret, and because jhash (instead of siphash) is used. The hashrnd value remains the same starting from boot time, and can be inferred by an attacker. This affects net/core/flow_dissector.c and related code.

Solution(s)

  • f5-big-ip-upgrade-latest

References

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