Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gurux | Device Language Message Specification Director | < 8.5.1905.1301 |
Related Weaknesses (CWE)
References
- https://github.com/seqred-s-a/gxdlmsdirector-cveExploitThird Party Advisory
- https://seqred.pl/en/cve-gurux-gxdlms-director/ExploitThird Party Advisory
- https://github.com/seqred-s-a/gxdlmsdirector-cveExploitThird Party Advisory
- https://seqred.pl/en/cve-gurux-gxdlms-director/ExploitThird Party Advisory
FAQ
What is CVE-2020-8809?
CVE-2020-8809 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 mod...
How severe is CVE-2020-8809?
CVE-2020-8809 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-8809?
Check the references section above for vendor advisories and patch information. Affected products include: Gurux Device Language Message Specification Director.