CVE-2021-20322

CVE Details

Release Date:

2022-02-18

Description

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.

See more information about CVE-2021-20322 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	7.4	Base Metrics:	AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Access Vector:	Network	Attack Complexity:	High
Privileges Required:	None	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	High
Integrity Impact:	High	Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (kernel-uek)	ELSA-2022-9260	2022-04-05
Oracle Linux version 7 (kernel-uek)	ELSA-2022-9260	2022-04-05
Oracle Linux version 8 (kernel)	ELSA-2022-1988	2022-05-17
Oracle VM version 3 (kernel-uek)	OVMSA-2022-0011	2022-04-05

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team