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Vulnerability Details : CVE-2017-18371

The ZyXEL P660HN-T1A v2 TCLinux Fw #7.3.37.6 router distributed by TrueOnline has three user accounts with default passwords, including two hardcoded service accounts: one with the username true and password true, and another with the username supervisor and password zyad1234. These accounts can be used to login to the web interface, exploit authenticated command injections, and change router settings for malicious purposes.
Publish Date : 2019-05-02 Last Update Date : 2019-05-03
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- CVSS Scores & Vulnerability Types

CVSS Score
7.5
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 798

- Products Affected By CVE-2017-18371

# Product Type Vendor Product Version Update Edition Language
1 OS Billion 5200w-t Firmware 7.3.8.0 Version Details Vulnerabilities
2 OS Zyxel P660hn-t1a V1 Firmware 7.3.37.6 Version Details Vulnerabilities
3 OS Zyxel P660hn-t1a V2 Firmware 7.3.37.6 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Billion 5200w-t Firmware 1
Zyxel P660hn-t1a V1 Firmware 1
Zyxel P660hn-t1a V2 Firmware 1

- References For CVE-2017-18371

https://ssd-disclosure.com/index.php/archives/2910
https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireless-presentation-display-systems/
https://seclists.org/fulldisclosure/2017/Jan/40
https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline.txt

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)
Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)
Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)

- Metasploit Modules Related To CVE-2017-18371

TrueOnline / ZyXEL P660HN-T v2 Router Authenticated Command Injection
TrueOnline is a major ISP in Thailand, and it distributes a customized version of the ZyXEL P660HN-T v2 router. This customized version has an authenticated command injection vulnerability in the remote log forwarding page. This can be exploited using the "supervisor" account that comes with a default password on the device. This module was tested in an emulated environment, as the author doesn't have access to the Thai router any more. Any feedback should be sent directly to the module's author, as well as to the Metasploit project. Note that the inline payloads work best. There are Turkish and other language strings in the firmware, so it is likely that this firmware is not only distributed in Thailand. Other P660HN-T v2 in other countries might be vulnerable too.
Module type : exploit Rank : excellent Platforms : Linux


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