QID 353161

Date Published: 2022-02-09

QID 353161: Amazon Linux Security Advisory for kernel : ALAS-2022-1563

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. (
( CVE-2021-20322) a denial of service flaw for virtual machine guests in the linux kernels xen hypervisor subsystem was found in the way users call some interrupts with high frequency from one of the guests. a local user could use this flaw to starve the resources resulting in a denial of service. (
( CVE-2021-28711) a denial of service flaw for virtual machine guests in the linux kernels xen hypervisor subsystem was found in the way users call some interrupts with high frequency from one of the guests. a local user could use this flaw to starve the resources resulting in a denial of service. (
( CVE-2021-28712) a denial of service flaw for virtual machine guests in the linux kernels xen hypervisor subsystem was found in the way users call some interrupts with high frequency from one of the guests. a local user could use this flaw to starve the resources resulting in a denial of service. (
( CVE-2021-28713) ( CVE-2021-28714) ( CVE-2021-28715)

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as High - 6.5 severity.
  • CVSS V2 rated as Low - 2.1 severity.
    • Solution
    Please refer to Amazon advisory: ALAS-2022-1563 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 353161

    CVE-2021-4002 | CVE-2021-3772 | CVE-2022-0492 | CVE-2021-4155 | CVE-2021-20322 | CVE-2021-28711 | CVE-2021-28712 | CVE-2021-28715 | CVE-2021-28713 | CVE-2021-28714 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS-2022-1563 Amazon Linux URL Logo alas.aws.amazon.com/ALAS-2022-1563.html
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