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.

CVSS Metrics

• v3.1•HIGH•Score: 7.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

EPSS Trends

Current EPSS score: 0.11%• Percentile: 28%

Techniques & Countermeasures

• CWE-681•Incorrect Conversion between Numeric Types

  When converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur.

Affected Systems

• coredns•coredns

  ≥ 1.2.0, < 1.12.4

• github.com/coredns•coredns

  ≥ 1.2.0, < 1.12.4

References (4)

• https://github.com/coredns/coredns/security/advisories/GHSA-93mf-426m-g6x9
• https://github.com/coredns/coredns/commit/e1768a5d272e9da649dfb8588595e5c6e4e640bf
• https://nvd.nist.gov/vuln/detail/CVE-2025-58063
• https://github.com/coredns/coredns