Geeklog 2.1.0: XSS

Date: 2015-12-02 11:14:18

Security Advisory – Curesec Research Team

1. Introduction

Affected Product:	Geeklog 2.1.0
Fixed in:	2.1.1b3
Fixed Version Link:	https://www.geeklog.net/filemgmt/visit.php/1156
Vendor Contact:	geeklog-security@lists.geeklog.net
Vulnerability Type:	XSS
Remote Exploitable:	Yes
Reported to vendor:	09/29/2015
Disclosed to public:	12/02/2015
Release mode:	Coordinated release
CVE:	requested, but not assigned
Credits	Tim Coen of curesec GmbH

2. Vulnerability Description

CVSS

Medium 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Description

There is at least one XSS vulnerability in the installation script of Geeklog.

Geeklog recommends to delete the install directory and displays warnings in the admin area if this is not the case. However, deleting the install directory is not mandatory, so it should be assumed that not all users will delete it.

3. Proof of Concept

http://localhost/geeklog-2.1.0/public_html/admin/install/bigdump.php?foffset=1&start=1&fn=te<script>alert(1)</script>st.sql

$_REQUEST['site_url'], $_REQUEST['site_admin_url'], and $_SERVER['PHP_SELF'] may be vulnerable as well, but the attacker would need a valid sql backup file to trigger them.

4. Solution

To mitigate this issue please upgrade at least to version 2.1.1b3:

https://www.geeklog.net/filemgmt/visit.php/1156

Please note that a newer version might already be available.

5. Report Timeline

09/29/2015	Informed Vendor about Issue (no reply)
10/21/2015	Reminded Vendor of Disclosure Date
10/21/2015	Vendor asks for an additional two weeks for testing
11/17/2015	CVE Requested (no reply)
11/30/2015	Vendor releases fix
12/02/2015	Disclosed to public