0dd - The Zero (0) Day Division

The Zero (0) Day Division is a group of security professionals working towards a common goal; securing open-source projects.

Anyplace XXE

The Issue

An XML External Entity attack is a type of attack against an application that parses XML input. This attack occurs when XML input containing a reference to an external entity is processed by a weakly configured XML parser. This attack may lead to the disclosure of confidential data, denial of service, server side request forgery, port scanning from the perspective of the machine where the parser is located, and other system impacts.

Anyplace insecurely parses user-supplied XML content within the GMapV2Direction.java file, allowing attackers to perform XXE attacks.

Where the Issue Occurred

The code below retrieves the XML content and performs insecure XML parsing (found on line 91 anyplace/android/Anyplace/src/com/dmsl/anyplace/googleapi/GMapV2Direction.java#L91):

Document doc = builder.parse(in);

The URL below can be intercepted (found on line 76 anyplace/android/Anyplace/src/com/dmsl/anyplace/googleapi/GMapV2Direction.java#L76):

String url = "http://maps.googleapis.com/maps/api/directions/xml?" + "origin=" + fromLatitude + "," + fromLongitude + "&destination=" + toPosition.lat + "," + toPosition.lng 

Disclosure Timeline

  • Issue Reported: 29th September 2018
  • Blog Post Published: 28th October 2018
  • Applied for CVE: