CVE-2022-3924
CVE-2022-3924 · named configured to answer from stale cache may terminate unexpectedly at recursive-clients soft quota
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 7.5 · High · EPSS 16.1% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
bind 9
- Versions
- ≥ 9.16.12, ≤ 9.16.36: Affected (custom)
- ≥ 9.18.0, ≤ 9.18.10: Affected (custom)
- ≥ 9.19.0, ≤ 9.19.8: Affected (custom)
- ≥ 9.16.12-S1, ≤ 9.16.36-S1: Affected (custom)
No fix published
bind9 Debian:12
- Affected ranges
- ECOSYSTEM: < 1:9.18.11-1
Update to 1:9.18.11-1
bind9 Debian:13
- Affected ranges
- ECOSYSTEM: < 1:9.18.11-1
Update to 1:9.18.11-1
bind9 Debian:14
- Affected ranges
- ECOSYSTEM: < 1:9.18.11-1
Update to 1:9.18.11-1
bind9 Ubuntu:22.04:LTS
- Versions
- 1:9.16.15-1ubuntu1
- 1:9.16.15-1ubuntu2
- 1:9.16.15-1ubuntu3
- 1:9.18.0-2ubuntu1
- 1:9.18.0-2ubuntu2
- 1:9.18.0-2ubuntu3
- 1:9.18.1-1ubuntu1
- 1:9.18.1-1ubuntu1.1
- 1:9.18.1-1ubuntu1.2
- Affected ranges
- ECOSYSTEM: < 1:9.18.1-1ubuntu1.3
Update to 1:9.18.1-1ubuntu1.3