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Vulnerability DatabaseCVE-2023-6516
CVE-2023-6516:
NixOS vulnerability analysis and mitigation
Overview
CVE-2023-6516 affects BIND 9 versions 9.16.0 through 9.16.45 and 9.16.8-S1 through 9.16.45-S1. The vulnerability was disclosed by Internet Systems Consortium (ISC) on February 13, 2024, and received a CVSS v3.1 base score of 7.5 (HIGH) (ISC Advisory).
Technical details
The vulnerability occurs in the cache database maintenance of named running as a recursive resolver. When the resolver continuously processes query patterns triggering cache-database maintenance, it may not handle cleanup events timely. This allows the list of queued cleanup events to grow infinitely large over time, exceeding the configured max-cache-size limit (NVD).
Impact
Successful exploitation of this vulnerability could lead to a Denial of Service (DoS) condition through out-of-memory situations, as the cache database grows beyond configured limits (NetApp Advisory).
Mitigation and workarounds
Organizations should upgrade to fixed versions of BIND 9. Patches are available through official distribution channels and package maintainers. For example, Fedora has released updates for affected versions (Fedora Update).
Additional resources
Source: This report was generated using AI
Related NixOS vulnerabilities:
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