Allied Telesis AT-RG634A ADSL Broadband Router – Web Shell

• Exploit Database
• 15 阅读

• 作者： Groundworks Technologies
  日期： 2014-03-26
• 类别：

  • webapps
  平台：

  • hardware
• 来源：https://www.exploit-db.com/exploits/32545/

• *Title:*
  
  Allied Telesis AT-RG634A ADSL Broadband router hidden administrative
  unauthenticated webshell.
  
  *Vulnerability Information:*
  - CVE: CVE-2014-1982
  - Type of Vulnerability:
  - CWE-78: OS Command Injection
  - CWE-306 : Missing Authentication for Critical Function
  
  *Affected products:*
  
  - Allied Telesis AT-RG634A ADSL Broadband router. (version 3.3+ and
  probably others)
  
  Other products like,
   - Allied Telesis iMG624A(firmware version, 3.5)
   - Allied Telesis iMG616LH (firmware version, +2.4)
   - Allied Telesis iMG646BD (firmware version, 3.5)
  
  *Vendor:*
  - Allied Telesis : http://www.alliedtelesis.com//
  
  
  has the same vulnerbility, but the vendor reports that the version
  3.8.05 of the firmware has already addressed this issue, but we where
  unable to test nor confirm this information.
  
  *Security Patches / Workaround:*
  
  - Allied Telesis has noted that the AT-RG634A product is no longer
  supported, but gives a workaround
  to mitigate the issue.
  
  Configure the device so that only trusted devices can
  access the target device using the following command,
  
  "WEBSERVER SET MANAGEMENTIP <ip-address>"
  
  *Short Description:*
  
  The Allied Telesis AT-RG634A ADSL Broadband router has a hidden url
  page in their admnistrative HTTP interface capable of executing
  commands as admin without requiring any kind of authentication.
  
  *Description:*
  
  "The AT-RG634 is a full-featured, broadband media gateway and router
  designed for cost-effective delivery of advanced IP Triple Play voice,
  video and data services over an ADSL infrastructure. The RG634
  supports Layer 3 functions, including NAT, DMZ, and Stateful
  inspection firewall for delivery of revenue-generating services such
  as home networking and security services." (from
  www.alliedtelesis.com/p-2345.html)
  
  The Allied Telesis AT-RG634A ADSL Broadband router has a hidden URL
  (/cli.html) page to execute CLI command with admin priviledges,
  available by default and without any kind of authentication.
  
  Having as impact a total compromise of the target device.
  
  *Steps to reproduce:*
  
  - Connect via HTTP to the hidden page http://<device IP>/cli.html a
  input box is shown, every command typed there will be executed as admin.
  
  Entering the following lines in the hidden page (/cli.html) a new
  telnet admin user called "eviluser" is added to the system.
  
  >> system add login eviluser system set user eviluser access
  >> superuser.
  
  
  *Credits:*
  
  This security issue was discovered and researched by Sebastian Muniz
  (topo), Security Researcher of Groundworks Technologies
  (http://www.groundworkstech.com)
  
  
  *License:*
  
  The contents of this advisory are copyright (c) 2014 Groundworks
  Technologies,and are licensed under a Creative Commons Attribution
  Non-Commercial Share-Alike 3.0 (United States) License:
  http://creativecommons.org/licenses/by-nc-sa/3.0/us/