جزئیات آسیب‌پذیری

CoreDNS is a DNS server written in Go. Prior to 1.14.7, the DNS-over-HTTPS, DNS-over-HTTP/3, DNS-over-QUIC, and DNS-over-gRPC request paths in plugin/pkg/doh/doh.go, core/dnsserver/server_quic.go, and core/dnsserver/server_grpc.go call dns.Msg.Unpack on attacker-controlled DNS section counts before dns.DefaultMsgAcceptFunc validates the fixed header. An unauthenticated client can use DNS name compression and excessive section counts to amplify allocation before the plugin chain, so plugin-level rate limiting cannot prevent concurrent requests from exhausting memory and terminating CoreDNS. The ordinary UDP and TCP listeners are not affected because they validate the header first. This issue is fixed in version 1.14.7.

• https://github.com/coredns/coredns/commit/530b0a5ff2ad68cc0421f10dd93568945cc671c9 x_refsource_MISC
• https://github.com/coredns/coredns/releases/tag/v1.14.7 x_refsource_MISC
• https://github.com/coredns/coredns/security/advisories/GHSA-mrg3-qvqr-jw29 x_refsource_CONFIRM