exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

Conceptronic Grab'n'Go Authorization Bypass

Conceptronic Grab'n'Go Authorization Bypass
Posted Sep 6, 2012
Authored by Mattijs van Ommeren

Conceptronic Grab'n'Go suffers from an authorization bypass vulnerability.

tags | exploit, bypass
SHA-256 | 42cecd54b14cb62c44e3815cbfcd80eb91c178a79e49e83d51e4c50a4dc5801d

Conceptronic Grab'n'Go Authorization Bypass

Change Mirror Download
Security Advisory AA-005: Authorization Bypass Vulnerability in Password Reset Function Conceptronic Grab’n’Go Network Storage (0-day) 

Severity Rating: High
Discovery Date: July 29, 2012
Vendor Notification: July 30, 2012
Disclosure Date: September 6, 2012

Vulnerability Type=
Authorization Bypass

System Access

Alcyon rates the severity of this vulnerability as high due to the following properties:

- Ease of exploitation;
- No authentication credentials required;
- No knowledge about individual victims required;
- No interaction with the victim required.

Products and firmware versions affected=
- Conceptronic CH3ENAS, all firmware versions up to and including 3.0.12
- Conceptronic CH3HNAS, all firmware versions up to and including 2.4.13
- Possibly other rebranded Mapower network storage products are also affected by this flaw.

Risk Assessment=
An attacker can log into the web management UI with an arbitrarily chosen password. Possibilities include but are not limited to reading and writing files stored on the device and altering the device’s configuration.

This means an attacker could:

- Steal sensitive data stored on the device;
- Leverage the device to drop and/or host malware;
- Abuse the device to send spam through the victim’s Internet connection;
- Use the device as a pivot point to access locally connected systems or launch attacks directed to other systems.

The function that is responsible for changing the administrator password can be called by an unauthenticated used. It uses the flawed assumption that the call is part of an admin session if:
1. a static valued cookie is present; and:
2. a parameter that is usually hidden by the browser is present in the query.
Note that the cookie value is checked on the client so it can be easily circumvented by a command line tool

Proof of Concept Exploit=
Execute the following command to set the administrator’s password of a vulnerable Conceptronic NAS:

curl http://<victimIP>/cgi-bin/setup.cgi?ToolsAdmin&<password>&600000&Conceptronic2009

Risk Mitigation=
At the time of disclosure no updated firmware version was available.

We recommend that you limit access to the web management UI of the device by utilizing proper packet filtering and/or NAT on your router in order to limit network access to your NAS. Although this will not completely eliminate the risk of exploitation, it becomes substantially more difficult to leverage a successful attack, because it would involve either compromise of another host on the victim’s local network or a client side attack that overcomes the Same Origin Policy restrictions of the victim’s web browser.

Vendor responses=

Fixed Versions=
There is currently no vendor patch available.

Latest version of this advisory=
- http://www.alcyon.nl/advisories/aa-005

Login or Register to add favorites

File Archive:

July 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Jul 1st
    27 Files
  • 2
    Jul 2nd
    10 Files
  • 3
    Jul 3rd
    35 Files
  • 4
    Jul 4th
    27 Files
  • 5
    Jul 5th
    18 Files
  • 6
    Jul 6th
    0 Files
  • 7
    Jul 7th
    0 Files
  • 8
    Jul 8th
    28 Files
  • 9
    Jul 9th
    44 Files
  • 10
    Jul 10th
    24 Files
  • 11
    Jul 11th
    25 Files
  • 12
    Jul 12th
    11 Files
  • 13
    Jul 13th
    0 Files
  • 14
    Jul 14th
    0 Files
  • 15
    Jul 15th
    28 Files
  • 16
    Jul 16th
    6 Files
  • 17
    Jul 17th
    34 Files
  • 18
    Jul 18th
    6 Files
  • 19
    Jul 19th
    0 Files
  • 20
    Jul 20th
    0 Files
  • 21
    Jul 21st
    0 Files
  • 22
    Jul 22nd
    0 Files
  • 23
    Jul 23rd
    0 Files
  • 24
    Jul 24th
    0 Files
  • 25
    Jul 25th
    0 Files
  • 26
    Jul 26th
    0 Files
  • 27
    Jul 27th
    0 Files
  • 28
    Jul 28th
    0 Files
  • 29
    Jul 29th
    0 Files
  • 30
    Jul 30th
    0 Files
  • 31
    Jul 31st
    0 Files

Top Authors In Last 30 Days

File Tags


packet storm

© 2022 Packet Storm. All rights reserved.

Security Services
Hosting By