CVE-2026-32953 Tillitis TKey客户端密钥忽略漏洞

package main import ( "crypto/sha256" "encoding/hex" "fmt" ) // Simulating the vulnerable buffer index error logic demonstrateVulnerability := func(uss string) { // Hash the User Supplied Secret (USS) hash := sha256.Sum256([]byte(uss)) ussEnabled := true // Assume USS is intended to be used fmt.Printf("USS: %s\n", uss) fmt.Printf("Hash: %s\n", hex.EncodeToString(hash[:])) // VULNERABLE CODE SIMULATION: // The buffer index error causes the first byte of the USS digest // to overwrite the ussEnabled boolean variable. // In Go, if we treat the boolean memory as a byte, 0x00 is false. firstByte := hash[0] // Simulating the overwrite if firstByte == 0x00 { ussEnabled = false } fmt.Printf("First byte of hash: 0x%02x\n", firstByte) if ussEnabled { fmt.Println("Result: USS is APPLIED (Secure)") } else { fmt.Println("Result: USS is IGNORED (Vulnerable - CDI same as no USS)") } fmt.Println("---") } func main() { // Case 1: A hash starting with non-00 (Safe) demonstrateVulnerability("normal_secret_data") // Case 2: Attempt to find a hash starting with 00 (Vulnerable) // For demonstration, we just simulate the logic for a specific input // that results in 0x00, or explain the probability. // Since we can't easily find a collision in a simple example, // we force the logic to show the vulnerable state. fmt.Println("Simulating a hash starting with 0x00...") hash := sha256.Sum256([]byte("some_input")) // Manually setting first byte to 0x00 for demonstration of the bug consequence hash[0] = 0x00 ussEnabled := true if hash[0] == 0x00 { ussEnabled = false } fmt.Printf("Hash starts with: 0x%02x\n", hash[0]) if !ussEnabled { fmt.Println("Result: USS is IGNORED (Vulnerable - CDI same as no USS)") } }