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.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 9.18.36, < 9.18.49CPE matchmatch criteria | cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* | ||
>= 9.20.8, < 9.20.23CPE matchmatch criteria | cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* | ||
>= 9.21.7, < 9.21.21CPE matchmatch criteria | cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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