If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.
| Vendor | Product | Versions |
|---|---|---|
| isc | bind | 9.11.0, 9.20.0, 9.21.0, 9.11.3-S1, 9.20.9-S1 |
Downstream vendors/products affected by this vulnerability
| Vendor | Product | Source | Confidence |
|---|---|---|---|
| debian | debian linux | cert_advisory | 90% |
| internet systems consortium | bind | cert_advisory | 90% |
Severity updated from HIGH to CRITICAL based on vendor classification; CVSS estimated at 9.0 for critical severity.
Initial creation
