Use of Insufficiently Random Values Affecting linux-4.19 package, versions <4.19.232-1~deb9u1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.63% (80th percentile)

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  • Snyk IDSNYK-DEBIAN9-LINUX419-2420570
  • published19 Oct 2021
  • disclosed18 Feb 2022

Introduced: 19 Oct 2021

CVE-2021-20322  (opens in a new tab)
CWE-330  (opens in a new tab)

How to fix?

Upgrade Debian:9 linux-4.19 to version 4.19.232-1~deb9u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-4.19 package and not the linux-4.19 package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

A flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux kernel functionality was found to allow the ability to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypass the source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well.

CVSS Base Scores

version 3.1