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Java System Solutions SSO Plugin For BMC MyIT 4.0.13.1 Cross Site Scripting

Java System Solutions SSO Plugin For BMC MyIT 4.0.13.1 Cross Site Scripting
Posted Aug 20, 2018
Authored by Marco Murch

Java System Solutions SSO plugin for BMC MyIT version 4.0.13.1 suffers from a cross site scripting vulnerability.

tags | exploit, java, xss
advisories | CVE-2018-15528
SHA-256 | dc1139a3e435f0009cc81e57d55e45a0ccf9ecb5879c567ef9b84bbdb53292c6

Java System Solutions SSO Plugin For BMC MyIT 4.0.13.1 Cross Site Scripting

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Title:
======

Reflected XSS in Java System Solutions SSO Plugin 4.0.13.1 for BMC MyIT

Description:
============

Reflected Cross-Site Scripting in Java System Solutions' BMC MyIT SSO Plugin version 4.0.13.1 was identified during a penetration test. Other versions might be affected as well. A remote attacker can abuse this issue to inject client-side scripts into the "select_sso()" function. The payload is triggered when the victim opens a prepared link and hits the "Login" button.

Proof-of-concept:
=================

Open https://<hostname>/ux/jss-sso/arslogin?javascript:alert(%27Deloitte%20XSS%20PoC%27) and hit the "Login" button.

Affected function:
==================

function select_sso() {
console.log('SSO login');
id('loginForm').action= 'javascript:alert(%27Deloitte%20XSS%20PoC%27)';
id('username').name= 'username';
id('password').name= 'password';

usingsso(true);

Solution:
=========

Contact vendor for fix.

Disclosure Timeline:
====================

2018-07-17: Vulnerability discovered
2018-07-17: Vulnerability reported to manufacturer
2018-07-17: Response from manufacturer that vulnerability is known and has been fixed, but refused to provide any details
2018-08-09: Requested CVE ID from MITRE; CVE-2018-15528 was reserved
2018-08-20: Public disclosure of vulnerability & notification to manufacturer

Credits:
========

This security vulnerability was found by Marco Murch of Deloitte GmbH.

E-Mail: mamu[DELETE_ME_:-)]rch[at]deloitte[dot]de
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