BIND resolvers are vulnerable to an amplified resource consumption/exhaustion attack. If a victim resolver makes a query to a specially crafted zone, the resolver will consume disproportionate resources. This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
Weakness
The product allows an entity to perform a legitimate but expensive operation before authentication or authorization has taken place.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Bind | Isc | 9.11.0 (including) | 9.16.50 (including) |
| Bind | Isc | 9.18.0 (including) | 9.18.49 (excluding) |
| Bind | Isc | 9.20.0 (including) | 9.20.23 (excluding) |
| Bind | Isc | 9.21.0 (including) | 9.21.22 (excluding) |
| Red Hat Hardened Images | RedHat | bind-main-9.18.49-1.hum1 | * |
| Bind9 | Ubuntu | devel | * |
| Bind9 | Ubuntu | esm-infra/xenial | * |
| Bind9 | Ubuntu | jammy | * |
| Bind9 | Ubuntu | noble | * |
| Bind9 | Ubuntu | questing | * |
| Bind9 | Ubuntu | resolute | * |
| Bind9 | Ubuntu | upstream | * |