High severity · published Sep 9, 2025
CVE-2025-58063
CoreDNS: DNS Cache Pinning via etcd Lease ID Confusion
7.1
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
coredns · coredns
>= 1.2.0, < 1.12.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-58063
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-58063
github.com
https://github.com/coredns/coredns/commit/e1768a5d272e9da649dfb8588595e5c6e4e640bf
github.com
https://github.com/coredns/coredns/security/advisories/GHSA-93mf-426m-g6x9
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