| Package | Affected versions | Patched versions |
|---|---|---|
| bind | ≥ 9.11.0, ≤ 9.16.50≥ 9.18.0, < 9.18.47≥ 9.20.0, < 9.20.21≥ 9.21.0, < 9.21.20 | 9.18.479.20.219.21.20 |
If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU. Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries (see: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries). This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.46, 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.46-S1, and 9.20.9-S1 through 9.20.20-S1.
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