CVE-2025-58063 (CVSS 7.1)

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.

Is your site exposed to CVE-2025-58063?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Weakness Type (CWE)

CWE-681 CWE-681

References

Other References

https://github.com/coredns/coredns/commit/e1768a5d272e9da649dfb8588595e5c6e4e640bf https://github.com/coredns/coredns/security/advisories/GHSA-93mf-426m-g6x9 https://github.com/coredns/coredns/security/advisories/GHSA-93mf-426m-g6x9

Frequently Asked Questions

What is CVE-2025-58063? +

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. It has a CVSS v3.1 base score of 7.1 (HIGH).

How severe is CVE-2025-58063? +

CVE-2025-58063 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2025-58063? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2024-26162 8.8

Microsoft ODBC Driver Remote Code Execution Vulnerability

CVE-2024-49093 8.8

Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability

CVE-2025-53733 8.4

Incorrect conversion between numeric types in Microsoft Office Word allows an unauthorized attacker to execute code locally.

CVE-2026-45258 7.8

dsp_mmap_single() validated the requested mapping by checking the sum of the user-supplied offset and length against the buffer size. This …

CVE-2025-24059 7.8

Incorrect conversion between numeric types in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-24192 7.8

NVIDIA Display Driver for Linux contains a vulnerability where an attacker could cause an incorrect conversion between numeric types, leading …

CVE-2025-58063