Description
CoreDNS is a DNS server written in Go. From 1.9.4 until 1.14.5, a network DNS client allowed to request AXFR for a CoreDNS zone can trigger a panic when CoreDNS is configured with k8s_external headless-service zone transfers and Kubernetes contains a headless service endpoint with no declared ports; plugin/kubernetes/object/endpoint.go creates Port: -1, plugin/k8s_external/msg_to_dns.go skips that service, plugin/k8s_external/transfer.go sends an empty []dns.RR batch, and plugin/transfer/transfer.go indexes records[0] without checking the batch is non-empty. This issue is fixed in version 1.14.5.
Affected products
coredns.io: coredns
References5
- github.com/coredns/coredns/commit/ab318db7b4a3a19273852ed627f54… Patch
- github.com/coredns/coredns/pull/8207 Issue TrackingPatch
- github.com/coredns/coredns/security/advisories/GHSA-74w3-63xv-x… ExploitThird Party Advisory
- github.com/coredns/coredns/security/advisories/GHSA-74w3-63xv-x… ExploitThird Party Advisory
- github.com/coredns/coredns/releases/tag/v1.14.5 Release Notes
Metrics
- CVSS 3.1
-
3.7
LOW
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L - EPSS — exploit probability
- 0% percentile: 40 · as of 15 November 2026
- CWE
- CWE-248CWE-755
Could this be exploited in your environment?
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