CVE-2026-62299

Description

CoreDNS is a DNS server written in Go. Prior to 1.14.5, the CoreDNS rewrite plugin supports edns0 rewrite rules with an optional revert flag, and two response rules, edns0SetResponseRule and edns0ReplaceResponseRule[T] in plugin/rewrite/edns0.go, call res.IsEdns0() and immediately dereference the returned *dns.OPT without a nil check when a downstream plugin returns a response with no OPT record. A remote, unauthenticated client can send a single ordinary DNS query matching a rewrite edns0 <local|nsid|subnet> <set|append|replace> ... revert rule, causing ResponseReverter in plugin/rewrite/reverter.go to panic, return SERVFAIL, and degrade availability, or crash the CoreDNS process if the debug directive disables recovery. This issue is fixed in version 1.14.5.

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Produits concernés

• coredns
• Coredns.io coredns

Scores CVSS

Faiblesses (CWE)

• CWE-476

Références

• https://github.com/coredns/coredns/commit/fc447d0658b093edc8cd29a6b171216a44a644c2 Patch
• https://github.com/coredns/coredns/pull/8190 Issue TrackingPatch
• https://github.com/coredns/coredns/releases/tag/v1.14.5 Release Notes
• https://github.com/coredns/coredns/security/advisories/GHSA-9pmm-cxww-rrr7 ExploitThird Party Advisory
• https://github.com/coredns/coredns/security/advisories/GHSA-9pmm-cxww-rrr7 ExploitThird Party Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories