PRIOn knowledge basePRION:CVE-2022-3924Design/Logic Flaw
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.
| CPE | Name | Operator | Version |
|---|---|---|---|
| bind | eq | 9.16.13 s1 | |
| bind | eq | 9.16.21 s1 | |
| bind | eq | 9.16.32 s1 | |
| bind | eq | 9.16.14 s1 | |
| bind | ge | 9.19.0 | |
| bind | lt | 9.19.9 | |
| bind | ge | 9.18.0 | |
| bind | lt | 9.18.11 | |
| bind | eq | 9.16.36 s1 | |
| bind | ge | 9.16.12 |
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