QID 354918

Date Published: 2023-05-03

QID 354918: Amazon Linux Security Advisory for libxml2 : ALAS2-2023-2021

A null pointer dereference exists when parsing (invalid) xml schemas in libxml2 xmlschemacheckcosstderivedok (cve-2023-28484) libxml2 hashing of empty dict strings isn't deterministic.
When hashing empty strings which aren't null-terminated, xmldictcomputefastkey could produce inconsistent results.
This could lead to various logic or memory errors, including double frees. (
( CVE-2023-29469)



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 High - 6.5 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2-2023-2021 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 354918

    CVE-2023-29469 | CVE-2023-28484 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2-2023-2021 amazon linux 2 URL Logo alas.aws.amazon.com/AL2/ALAS-2023-2021.html
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