| Package | Affected versions | Patched versions |
|---|---|---|
| bind | ≥ 9.18.36, < 9.18.49≥ 9.20.8, < 9.20.23≥ 9.21.7, < 9.21.21 | 9.18.499.20.239.21.21 |
An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling, enabling a remote unauthenticated attacker to cause severe resource exhaustion by sending queries that trigger specific retry conditions. This issue affects BIND 9 versions 9.18.36 through 9.18.48, 9.20.8 through 9.20.22, 9.21.7 through 9.21.21, 9.18.36-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
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