CVE-2025-39952 Linux内核wilc1000驱动缓冲区溢出漏洞

// CVE-2025-39952 PoC - wilc1000 WID buffer overflow trigger // This PoC demonstrates the vulnerability by sending oversized WID string data // Note: Requires local access and ability to interact with wilc1000 device #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdint.h> // Simulated WID configuration structure struct wilc_cfg_str { uint16_t id; uint16_t len; // Buffer size limit (normally 512) char *str; // Target buffer }; // Simulated response frame parsing - vulnerable code path int wilc_wlan_parse_response_frame_vulnerable(struct wilc_cfg_str *cfg, int index) { // Malicious oversized data from firmware (65537 bytes) char malicious_data[65537]; memset(malicious_data, 'A', sizeof(malicious_data)); // cfg->str buffer is only 512 bytes - overflow occurs here // This is the vulnerable memcpy without size check memcpy(cfg->str, malicious_data, sizeof(malicious_data)); return 0; } // Fixed version with proper size check int wilc_wlan_parse_response_frame_fixed(struct wilc_cfg_str *cfg, int index) { char firmware_data[65537]; size_t data_len = sizeof(firmware_data); // Size check before memcpy - this is the fix if (data_len > cfg->len) { printf("Buffer overflow prevented: data size %zu > buffer size %d\n", data_len, cfg->len); return -1; // Reject oversized data } memcpy(cfg->str, firmware_data, data_len); return 0; } int main() { struct wilc_cfg_str config; char buffer[512]; config.id = 0x0001; // WID_STRING type config.len = 512; config.str = buffer; printf("Triggering CVE-2025-39952 buffer overflow...\n"); // wilc_wlan_parse_response_frame_vulnerable(&config, 0); // Would crash wilc_wlan_parse_response_frame_fixed(&config, 0); return 0; }