BIND 9 Resolver Crash with Stale Cache/Answer & RRSIG Query (9.16.12-9.19.8)
CVE-2022-3736 Published on January 26, 2023
named configured to answer from stale cache may terminate unexpectedly while processing RRSIG queries
BIND 9 resolver can crash when stale cache and stale answers are enabled, option `stale-answer-client-timeout` is set to a positive integer, and the resolver receives an RRSIG query.
This issue affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.12-S1 through 9.16.36-S1.
Vulnerability Analysis
CVE-2022-3736 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2022-3736
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Affected Versions
ISC BIND 9:- Version 9.16.12, <= 9.16.36 is affected.
- Version 9.18.0, <= 9.18.10 is affected.
- Version 9.19.0, <= 9.19.8 is affected.
- Version 9.16.12-S1, <= 9.16.36-S1 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.