CVE-2023-2828 (GCVE-0-2023-2828)

Vulnerability from cvelistv5 – Published: 2023-06-21 16:26 – Updated: 2025-02-13 16:48
VLAI
Title
named's configured cache size limit can be significantly exceeded
Summary
Every `named` instance configured to run as a recursive resolver maintains a cache database holding the responses to the queries it has recently sent to authoritative servers. The size limit for that cache database can be configured using the `max-cache-size` statement in the configuration file; it defaults to 90% of the total amount of memory available on the host. When the size of the cache reaches 7/8 of the configured limit, a cache-cleaning algorithm starts to remove expired and/or least-recently used RRsets from the cache, to keep memory use below the configured limit. It has been discovered that 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 be significantly exceeded. This issue affects BIND 9 versions 9.11.0 through 9.16.41, 9.18.0 through 9.18.15, 9.19.0 through 9.19.13, 9.11.3-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-06 18:36 UTC
Assigner
References
Impacted products
Vendor Product Version
ISC BIND 9 Affected: 9.11.0 , ≤ 9.16.41 (custom)
Affected: 9.18.0 , ≤ 9.18.15 (custom)
Affected: 9.19.0 , ≤ 9.19.13 (custom)
Affected: 9.11.3-S1 , ≤ 9.16.41-S1 (custom)
Affected: 9.18.11-S1 , ≤ 9.18.15-S1 (custom)
Create a notification for this product.
Date Public
2023-06-21 00:00
Credits
ISC would like to thank Shoham Danino from Reichman University, Anat Bremler-Barr from Tel-Aviv University, Yehuda Afek from Tel-Aviv University, and Yuval Shavitt from Tel-Aviv University for bringing this vulnerability to our attention.
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