Rapid7 Vulnerability & Exploit Database

Red Hat: CVE-2021-20322: Important: kernel-rt security and bug fix update (Multiple Advisories)

Back to Search

Red Hat: CVE-2021-20322: Important: kernel-rt security and bug fix update (Multiple Advisories)

Severity
6
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:N)
Published
02/18/2022
Created
05/14/2022
Added
05/13/2022
Modified
06/01/2022

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.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;