An issue was discovered on Vera VeraEdge 1.7.19 and Veralite 1.7.481 devices. The device provides a script file called "get_file.sh" which allows a user to retrieve any file stored in the "cmh-ext" folder on the device. However, the "filename" parameter is not validated correctly and this allows an attacker to directory traverse outside the /cmh-ext folder and read any file on the device. It is necessary to create the folder "cmh-ext" on the device which can be executed by an attacker first in an unauthenticated fashion and then execute a directory traversal attack.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
| Link | Tags |
|---|---|
| https://seclists.org/bugtraq/2019/Jun/8 | third party advisory mailing list |
| http://packetstormsecurity.com/files/153242/Veralite-Veraedge-Router-XSS-Command-Injection-CSRF-Traversal.html | vdb entry third party advisory |
| https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Vera_sec_issues.pdf | third party advisory exploit |