CVE-2024-11187: Many records in the additional section cause CPU exhaustion
Description
It is possible to construct a zone such that some queries to it will generate responses containing numerous records in the Additional section. An attacker sending many such queries can cause either the authoritative server itself or an independent resolver to use disproportionate resources processing the queries. Zones will usually need to have been deliberately crafted to attack this exposure.
This issue affects BIND 9 versions 9.11.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.32, 9.20.0 through 9.20.4, 9.21.0 through 9.21.3, 9.11.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.50-S1, and 9.18.11-S1 through 9.18.32-S1.
Classification
CVE ID: CVE-2024-11187
CVSS Base Severity: HIGH
CVSS Base Score: 7.5
Affected Products
Vendor: ISC
Product: BIND 9
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.04% (probability of being exploited)
EPSS Percentile: 11.77% (scored less or equal to compared to others)
EPSS Date: 2025-02-27 (when was this score calculated)