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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Wed, 10 Sep 2025 00:15:00 +0000
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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. | |
Title | CoreDNS: DNS Cache Pinning via etcd Lease ID Confusion | |
Weaknesses | CWE-681 | |
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-09-09T19:27:18.124Z
Reserved: 2025-08-22T14:30:32.222Z
Link: CVE-2025-58063

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Status : Received
Published: 2025-09-09T20:15:48.057
Modified: 2025-09-09T20:15:48.057
Link: CVE-2025-58063


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