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HomeAutomation v3.3.2 Authentication Bypass Exploit

High
Advisory ID
ZSL-2019-5557
Release Date
29 December 2019
Vendor
Tom Rosenback and Daniel Malmgren - http://karpero.mine.nu/ha/
Affected Version
3.3.2
Tested On
Apache/2.4.41 (centos) OpenSSL/1.0.2k-fips, Apache/2.4.29 (Ubuntu), PHP/7.4.0RC4, PHP/7.3.11, PHP 7.2.24-0ubuntu0.18.04.1
Summary

HomeAutomation is an open-source web interface and scheduling solution. It was initially made for use with the Telldus TellStick, but is now based on a plugin system and except for Tellstick it also comes with support for Crestron, OWFS and Z-Wave (using OpenZWave). It controls your devices (switches, dimmers, etc.) based on an advanced scheduling system, taking into account things like measurements from various sensors. With the houseplan view you can get a simple overview of the status of your devices at their location in your house.

Description

The application suffers from an authentication bypass vulnerability when spoofing client IP address using the X-Forwarded-For header with the local (loopback) IP address value allowing remote control of the smart home solution.

Proof of Concept
Disclosure Timeline
06.11.2019Vulnerability discovered.
07.11.2019Vendor contacted.
29.11.2019No response from the vendor.
30.11.2019Vendor contacted.
28.12.2019No response from the vendor.
29.12.2019Public security advisory released.
Credits
Vulnerability discovered by Gjoko Krstic
References
Changelog
29.12.2019Initial release
24.01.2020Added reference [1], [2], [3] and [4]
19.06.2021Added reference [5], [6] and [7]