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shankar0123
6315ef102a
The GlobalSign Atlas HVCA connector previously used InsecureSkipVerify:true on its mTLS TLS config, disabling server certificate validation and defeating the purpose of the client-side mTLS handshake. This was a CWE-295 Improper Certificate Validation vulnerability silently degrading trust on every production call to GlobalSign's signing API. Remediation (per H-5 audit finding, Lens 4.4): - Remove InsecureSkipVerify from all three http.Client construction sites (ValidateConfig, getHTTPClient, and legacy initialisation path). - Introduce buildServerTLSConfig() helper that constructs tls.Config with MinVersion: tls.VersionTLS12 (addresses adjacent L-1 recommendation). - New optional config field `server_ca_path` (env: CERTCTL_GLOBALSIGN_SERVER_CA_PATH). When unset the connector trusts the system root CA bundle (correct default for GlobalSign's publicly-trusted HVCA endpoints). When set the bundle is loaded via x509.NewCertPool() + AppendCertsFromPEM, and only those roots are trusted (supports private HVCA deployments and defence-in-depth root pinning). - Error wrapping chain: "failed to read server CA bundle at %s" and "no valid PEM certificates found in server CA bundle at %s" surface config problems at ValidateConfig time instead of silently failing at request time. Docs, config, service env-seed, and GUI issuer type definition updated to expose the new field. Tests: 9 dead `InsecureSkipVerify: true` client TLSClientConfig blocks (no-ops against httptest.NewServer plain-HTTP) replaced with bare http.Client; new TestGlobalSign_ServerTLSConfig covers pinned-CA trust, untrusted-server rejection, missing-file and invalid-PEM error paths. Verification: - go build ./... clean - go vet ./... clean - go test -race ./internal/connector/issuer/globalsign/... ./internal/config/... ./internal/service/... ok - go test ./... (excluding testcontainers-gated repo layer) ok - golangci-lint run ./... 0 issues - govulncheck ./... 0 reachable vulns - Per-layer coverage: service 68.7% (≥55), handler 83.6% (≥60), domain 82.0% (≥40), middleware 63.8% (≥30) - globalsign package coverage: 75.9% - Invariant sweep: 0 InsecureSkipVerify references remain in globalsign package (only a test-file comment documenting the removal).