IBM Cognos Business Intelligence Developer 10.2.1 (backURL) Open Redirect

Title: IBM Cognos Business Intelligence Developer 10.2.1 (backURL) Open Redirect
Advisory ID: ZSL-2015-5244
Type: Local/Remote
Impact: Spoofing
Risk: (2/5)
Release Date: 24.05.2015
IBM Cognos Business Intelligence is a web-based, integrated business intelligence suite by IBM. It provides a toolset for reporting, analysis, scorecarding, and monitoring of events and metrics. The software consists of several components to meet the different information requirements in a company.
Input passed via the 'backURL' GET parameter in '/p2pd/servlet/dispatch' is not properly verified before being used to redirect users. This can be exploited to redirect a user to an arbitrary website e.g. when a user clicks a specially crafted link to the affected script hosted on a trusted domain.
IBM Corporation -
Affected Version
10.2.1 (Build 10.2.5000.267) Trial
Tested On
Microsoft Windows 7 Ultimate SP1 (EN)
Apache Tomcat/6.0.35
Vendor Status
[22.04.2015] Vulnerability discovered.
[23.04.2015] Vendor contacted.
[23.04.2015] Vendor sends instructions for reporting security vulnerability.
[28.04.2015] Submitted details to vendor thru online form.
[29.04.2015] Vendor confirms submission assigning internal PSIRT Advisory ID 3198.
[05.05.2015] Asked vendor for status update.
[05.05.2015] Vendor is currently analyzing the issue.
[11.05.2015] Working with the vendor.
[15.05.2015] Vendor states that the issue is present only if the CAF (Cognos Application Firewall) is disabled (disabled by default in trial version).
[15.05.2015] Asked vendor to reconsider to create input validation strategy like whitelisting because application firewalls might not cover all vectors.
[18.05.2015] Vendor does not consider this an issue.
[19.05.2015] Mutual agreement with the vendor.
[28.05.2015] Public security advisory released.
Vulnerability discovered by Gjoko Krstic - <>
[28.05.2015] - Initial release
[01.06.2015] - Added reference [1] and [2]
Zero Science Lab