QID 352475

Date Published: 2021-07-14

QID 352475: Amazon Linux Security Advisory for kernel: ALAS-2021-1516

<DIV ID="issue_overview"> a denial-of-service (dos) flaw was identified in the linux kernel due to an incorrect memory barrier in xt_replace_table in net/netfilter/x_tables.c in the netfilter subsystem. (
cve-2021-29650 ) a flaw was found in kernel/bpf/verifier.c in bpf in the linux kernel.
An incorrect limit is enforced for pointer arithmetic operations which can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation.
The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (
cve-2021-33200 ) </DIV>

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.

Allows unauthorized disclosure of information; allows unauthorized modification; allows disruption of service.

  • CVSS V3 rated as High - 7.8 severity.
  • CVSS V2 rated as High - 7.2 severity.
    • Solution
    Please refer to Amazon advisory: ALAS-2021-1516 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 352475

    CVE-2021-29650 | CVE-2021-33200 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS-2021-1516 Amazon Linux URL Logo alas.aws.amazon.com/ALAS-2021-1516.html
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