### [CVE-2025-58063](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-58063)
![](https://img.shields.io/static/v1?label=Product&message=coredns&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3E%3D%201.2.0%2C%20%3C%201.12.4%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-681%3A%20Incorrect%20Conversion%20between%20Numeric%20Types&color=brightgreen)

### Description

CoreDNS is a DNS server that chains plugins. Starting in version 1.2.0 and prior to version 1.12.4, the CoreDNS etcd plugin contains a TTL confusion vulnerability where lease IDs are incorrectly used as TTL values, enabling DNS cache pinning attacks. This effectively creates a DoS condition for DNS resolution of affected services. The `TTL()` function in `plugin/etcd/etcd.go` incorrectly casts etcd lease IDs (64-bit integers) to uint32 and uses them as TTL values. Large lease IDs become very large TTLs when cast to uint32. This enables cache pinning attacks. Version 1.12.4 contains a fix for the issue.

### POC

#### Reference
- https://github.com/coredns/coredns/security/advisories/GHSA-93mf-426m-g6x9

#### Github
No PoCs found on GitHub currently.