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Amazon Linux AMI: CVE-2021-20322: Security patch for kernel ((Multiple Advisories))

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Amazon Linux AMI: CVE-2021-20322: Security patch for kernel ((Multiple Advisories))

Severity
6
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:N)
Published
11/24/2021
Created
02/10/2022
Added
02/08/2022
Modified
02/23/2023

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)

  • amazon-linux-upgrade-kernel

References

  • ALAS-2023-1688
  • CVE-2021-20322
  • USN-5268-1

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