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High severity7.1OSV Advisory· Published Sep 9, 2025· Updated Apr 15, 2026

CVE-2025-58063

CVE-2025-58063

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
github.com/coredns/corednsGo
>= 1.2.0, < 1.12.41.12.4

Affected products

102

Patches

Vulnerability mechanics

References

4

News mentions

0

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