Executive Summary

Summary
Title ZTE F460/F660 cable modems contain an unauthenticated backdoor
Informations
Name VU#600724 First vendor Publication 2014-03-04
Vendor VU-CERT Last vendor Modification 2014-03-19
Severity (Vendor) N/A Revision M

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 10 Attack Range Network
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Vulnerability Note VU#600724

ZTE F460/F660 cable modems contain an unauthenticated backdoor

Original Release date: 04 Mar 2014 | Last revised: 19 Mar 2014

Overview

ZTE F460/F660 cable modems contain an unauthenticated backdoor.

Description

ZTE F460/F660 cable modems contain an unauthenticated backdoor. The web_shell_cmd.gch script accepts unauthenticated commands that have administrative access to the device. It has been reported that the web_shell_cmd.gch script is sometimes accessible from the WAN interface making exploitation of this backdoor from the Internet possible in certain cases.

Additional details may be found in Rapid7's R7-2013-18 advisory.

ZTE has provided a statement about this vulnerability.

Impact

An unauthenticated attacker can run commands with administrator level access on the device.

Solution

We are currently unaware of a practical solution to this problem. Please consider the following workaround.

Remove Affected Script

Users can log into the device and manually delete the web_shell_cmd.gch script.

Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
ZTE CorporationAffected-19 Mar 2014
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

GroupScoreVector
Base8.3AV:A/AC:L/Au:N/C:C/I:C/A:C
Temporal7.1E:H/RL:W/RC:UC
Environmental5.3CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

  • https://community.rapid7.com/community/infosec/blog/2014/03/03/disclosure-r7-2013-18-zte-f460-and-zte-f660-webshellcmdgch-backdoor
  • http://www.myxzy.com/post-411.html

Credit

Thanks to Rapid7 for reporting this vulnerability.

This document was written by Jared Allar.

Other Information

  • CVE IDs:Unknown
  • Date Public:03 Mar 2014
  • Date First Published:04 Mar 2014
  • Date Last Updated:19 Mar 2014
  • Document Revision:17

Feedback

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Original Source

Url : http://www.kb.cert.org/vuls/id/600724

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-264 Permissions, Privileges, and Access Controls

CPE : Common Platform Enumeration

TypeDescriptionCount
Hardware 1
Hardware 1

Nessus® Vulnerability Scanner

Date Description
2014-03-19 Name : The remote device has a backdoor that allows administrative commands to be ex...
File : zte_web_shell_cmd.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
3
Date Informations
2014-03-20 13:21:41
  • Multiple Updates
2014-03-19 17:18:27
  • Multiple Updates
2014-03-11 21:30:09
  • Multiple Updates
2014-03-04 21:19:31
  • First insertion