CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a denial of service vulnerability exists in CoreDNSs loop detection plugin that allows an attacker to crash the DNS server by sending specially crafted DNS queries. The vulnerability stems from the use of a predictable pseudo-random number generator (PRNG) for generating a secret query name, combined with a fatal error handler that terminates the entire process. This issue has been patched in version 1.14.2.
Weakness
A Pseudo-Random Number Generator (PRNG) is initialized from a predictable seed, such as the process ID or system time.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Coredns | Coredns.io | * | 1.14.2 (excluding) |