c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target resolver sends a query, the attacker forges a malformed UDP packet with a length of 0 and returns them to the target resolver. The target resolver erroneously interprets the 0 length as a graceful shutdown of the connection. This issue has been patched in version 1.19.1.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| C-ares | C-ares_project | * | 1.19.1 (excluding) |