Use of Insufficiently Random Values Affecting kernel-uek-devel package, versions <0:4.14.35-1902.303.4.1.el7uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.25% (66th percentile)

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  • Snyk IDSNYK-ORACLE7-KERNELUEKDEVEL-2575877
  • published10 Apr 2022
  • disclosed16 Jan 2020

Introduced: 16 Jan 2020

CVE-2019-18282  (opens in a new tab)
CWE-330  (opens in a new tab)

How to fix?

Upgrade Oracle:7 kernel-uek-devel to version 0:4.14.35-1902.303.4.1.el7uek or higher.
This issue was patched in ELSA-2020-5715.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-devel package and not the kernel-uek-devel package as distributed by Oracle. See How to fix? for Oracle:7 relevant fixed versions and status.

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.

CVSS Scores

version 3.1