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Oracle Linux: (CVE-2019-18282) ELSA-2020-5437: kernel security and bug fix update

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Oracle Linux: (CVE-2019-18282) ELSA-2020-5437: kernel security and bug fix update

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
01/16/2020
Created
12/18/2020
Added
12/17/2020
Modified
12/17/2020

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)

  • oracle-linux-upgrade-kernel

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