Gurux · Gurux Gxdlms Director · CVE-2020-8809
**Name of the Vulnerable Software and Affected Versions**
Gurux GXDLMS Director versions prior to 8.5.1905.1301
**Description**
The issue allows a man-in-the-middle attacker to modify the contents of `gurux.fi/obis/files.xml` and `gurux.fi/updates/updates.xml`, prompting the user to download updates over an unencrypted HTTP connection. This can lead to code execution, either directly through add-ins if used, or through OBIS codes, which are necessary for communication with energy meters.
**Recommendations**
For versions prior to 8.5.1905.1301, update to version 8.5.1905.1301 or later to resolve the issue. As a temporary workaround, consider restricting access to the `gurux.fi/obis/files.xml` and `gurux.fi/updates/updates.xml` files to minimize the risk of exploitation. Avoid using unencrypted HTTP connections for downloading updates until the issue is resolved.