QID 354304

Date Published: 2022-12-21

QID 354304: Amazon Linux Security Advisory for kernel : ALAS2022-2022-024

A heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the filesystem context functionality of the linux kernel verified the supplied parameters length.
An unprivileged (in case of unprivileged user namespaces enabled, otherwise needs namespaced cap_sys_admin privilege) local user able to open a filesystem that does not support the filesystem context api (and thus fallbacks to legacy handling) could use this flaw to escalate their privileges on the system. (
( CVE-2022-0185) the cgroup release_agent is called with call_usermodehelper.
The function call_usermodehelper starts the release_agent with a full set of capabilities.
Therefore require capabilities when setting the release_agent. (
( CVE-2022-0492)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

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

  • CVSS V3 rated as Critical - 8.4 severity.
  • CVSS V2 rated as High - 7.2 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2022-2022-024 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 354304

    CVE-2022-0492 | CVE-2022-0185 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2022-2022-024 amazon linux 2022 URL Logo alas.aws.amazon.com/AL2022/ALAS-2022-024.html
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