QID 355122

Date Published: 2023-05-29

QID 355122: Amazon Linux Security Advisory for lz4 : ALAS2023-2023-015

There's a flaw in lz4.
An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash.
The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well. (
( CVE-2021-3520)



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 - 9.8 severity.
  • CVSS V2 rated as High - 7.5 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2023-2023-015 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 355122

    CVE-2021-3520 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2023-2023-015 amazon linux 2023 URL Logo alas.aws.amazon.com/AL2023/ALAS-2023-015.html
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