CVE-2022-3080: BIND 9 resolvers configured to answer from stale cache with zero stale-answer-client-timeout may terminate unexpectedly
A flaw was found in the Bind package, where the resolver can crash when stale cache and stale answers are enabled, option stale-answer-client-timeout is set to 0 and there is a stale CNAME in the cache for an incoming query. By sending specific queries to the resolver, an attacker can cause named to crash.
Other sources
BIND 9 resolver can crash when stale cache and stale answers are enabled, option stale-answer-client-timeout is set to 0 and there is a stale CNAME in the cache for an incoming query. By sending specific queries to the resolver, an attacker can cause named to crash.
— Red Hat
Affected Software
Remediation
Patch Available
Patch Available
Information
Event History
Parent advisories
This vulnerability appears in the following advisories.
Frequently Asked Questions
What is the vulnerability ID for this flaw?
The vulnerability ID for this flaw is CVE-2022-3080.
What is the impact of this vulnerability?
The impact of this vulnerability is that an attacker can cause named to crash.
What software is affected by this vulnerability?
The Bind package versions 9.16.33, 9.18.7, and 9.19.5, as well as specific versions of bind9 and ISC BIND, and Fedora versions 35, 36, and 37 are affected.
How can I fix this vulnerability?
To fix this vulnerability, update to Bind package version 9.16.33, 9.18.7, or 9.19.5, depending on your distribution and package source.
What is the severity level of this vulnerability?
The severity level of this vulnerability is high, with a CVSS score of 7.5.