CVE Vulnerability

CVE-2020-8809

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.

6.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

8.1 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/seqred-s-a/gxdlmsdirector-cve Exploit Third Party Advisory
https://seqred.pl/en/cve-gurux-gxdlms-director/ Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:gurux:device_language_message_specification_director:*:*:*:*:*:*:*:*
Information

Published : 2020-02-25 07:15

Updated : 2020-02-27 07:12

NVD link : CVE-2020-8809

Mitre link : CVE-2020-8809

Products Affected
No products.
CWE
CWE-494

Download of Code Without Integrity Check