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Amazon Linux AMI: CVE-2021-28713: Security patch for kernel ((Multiple Advisories))

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Amazon Linux AMI: CVE-2021-28713: Security patch for kernel ((Multiple Advisories))

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:N/I:N/A:P)
Published
01/05/2022
Created
02/10/2022
Added
02/08/2022
Modified
02/23/2023

Description

Rogue backends can cause DoS of guests via high frequency events T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen offers the ability to run PV backends in regular unprivileged guests, typically referred to as "driver domains". Running PV backends in driver domains has one primary security advantage: if a driver domain gets compromised, it doesn't have the privileges to take over the system. However, a malicious driver domain could try to attack other guests via sending events at a high frequency leading to a Denial of Service in the guest due to trying to service interrupts for elongated amounts of time. There are three affected backends: * blkfront patch 1, CVE-2021-28711 * netfront patch 2, CVE-2021-28712 * hvc_xen (console) patch 3, CVE-2021-28713

Solution(s)

  • amazon-linux-upgrade-kernel

References

  • ALAS-2023-1688
  • CVE-2021-28713
  • USN-5278-1
  • USN-5298-1
  • USN-5337-1
  • USN-5338-1
  • USN-5368-1
  • USN-5377-1
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