CVE-2020-8809 Information

Description

Gurux GXDLMS Director prior to 8.5.1905.1301 downloads updates to add-ins and OBIS code over an unencrypted HTTP connection. A man-in-the-middle attacker can prompt the user to download updates by modifying the contents of gurux.fi/obis/files.xml and gurux.fi/updates/updates.xml. Then the attacker can modify the contents of downloaded files. In the case of add-ins (if the user is using those) this will lead to code execution. In case of OBIS codes (which the user is always using as they are needed to communicate with the energy meters) this can lead to code execution when combined with CVE-2020-8810.

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/seqred-s-a/gxdlmsdirector-cve https://seqred.pl/en/cve-gurux-gxdlms-director/

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1