Title: meterN v1.2.3 Authenticated Remote Command Execution Vulnerability
Advisory ID: ZSL-2021-5690
Type: Local/Remote
Impact: System Access, DoS, Cross-Site Scripting
Risk: (4/5)
Release Date: 13.12.2021

Summary

meterN is a set of PHP/JS files that make a -Home energy metering & monitoring- solution. It accept any meters like : electrical, water, gas, fuel consumption, solar, Wind energy production and so on. Sensors such as temperature or humidity are also accepted. The philosophy is: To keep it simple, fast, with a low foot print to run on cheap and low powered devices.

Description

The application suffers from an authenticated OS command execution vulnerability. This can be exploited to execute arbitrary commands through the 'COMMANDx' and 'LIVECOMMANDx' POST parameters in admin_meter2.php and admin_indicator2.php scripts. The application interface allows users to perform these actions through HTTP requests without performing any validity checks to verify the requests. This CSRF can be exploited to perform actions with administrative privileges if a logged-in user visits a malicious web site.

Vendor

Jean-Marc Louviaux - https://www.metern.org

Affected Version

1.2.3 and 0.8.3.2

Tested On

Apache/2.4.10 (Raspbian)
Apache/2.4.46 (Win64)
Linux 4.9.67-v7+ GNU/Linux (armv7l)
Microsoft Windows 10 Home (10.0.19042 Build 19042)
PHP/7.2.33

Vendor Status

[14.01.2022] Vendor releases version 1.2.4.1 to address this issue.

PoC

metern_cmdexec.html

Credits

Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>

References

[1] https://packetstormsecurity.com/files/165273/
[2] https://www.exploit-db.com/exploits/50596
[3] https://exchange.xforce.ibmcloud.com/vulnerabilities/215320
[4] https://cxsecurity.com/issue/WLB-2021120071
[5] https://github.com/jeanmarc77/meterN/commit/fb8fbe1e681402282b014d4d139caaa7a54cf587

Changelog

[13.12.2021] - Initial release
[14.12.2021] - Added reference [1] and [2]
[17.12.2021] - Added reference [3] and [4]
[19.03.2024] - Added vendor status and reference [5]

Contact

Zero Science Lab

Web: https://www.zeroscience.mk
e-mail: lab@zeroscience.mk