QID 355628

Date Published: 2023-07-24

QID 355628: Amazon Linux Security Advisory for bind : ALAS2023-2023-240

A vulnerability was found in bind.
The effectiveness of the cache-cleaning algorithm used in named can be severely diminished by querying the resolver for specific rrsets in a certain order, effectively allowing the configured max-cache-size limit to exceed significantly. (
( CVE-2023-2828) if the `recursive-clients` quota is reached on a bind 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could cause `named` to loop and terminate unexpectedly due to a stack overflow. this issue affects bind 9 versions 9.16.33 through 9.16.41, 9.18.7 through 9.18.15, 9.16.33-s1 through 9.16.41-s1, and 9.18.11-s1 through 9.18.15-s1. (
( CVE-2023-2911)



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 - 7.5 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2023-2023-240 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 355628

    CVE-2023-2911 | CVE-2023-2828 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2023-2023-240 amazon linux 2023 URL Logo alas.aws.amazon.com/AL2023/ALAS-2023-240.html
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