Vulnerability Description
This issue can affect BIND 9 resolvers with `stale-answer-enable yes;` that also make use of the option `stale-answer-client-timeout`, configured with a value greater than zero. If the resolver receives many queries that require recursion, there will be a corresponding increase in the number of clients that are waiting for recursion to complete. If there are sufficient clients already waiting when a new client query is received so that it is necessary to SERVFAIL the longest waiting client (see BIND 9 ARM `recursive-clients` limit and soft quota), then it is possible for a race to occur between providing a stale answer to this older client and sending an early timeout SERVFAIL, which may cause an assertion failure. 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Isc | Bind | >= 9.16.12, < 9.16.37 |
Related Weaknesses (CWE)
References
- https://kb.isc.org/docs/cve-2022-3924Vendor Advisory
- https://kb.isc.org/docs/cve-2022-3924Vendor Advisory
FAQ
What is CVE-2022-3924?
CVE-2022-3924 is a vulnerability with a CVSS score of 7.5 (HIGH). This issue can affect BIND 9 resolvers with `stale-answer-enable yes;` that also make use of the option `stale-answer-client-timeout`, configured with a value greater than zero. If the resolver recei...
How severe is CVE-2022-3924?
CVE-2022-3924 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-3924?
Check the references section above for vendor advisories and patch information. Affected products include: Isc Bind.