ATTENTION: Remotely exploitable/low skill level to exploit.
Vendor: Schneider Electric
Equipment: Conext ComBox
Vulnerability: Resource Exhaustion
Schneider Electric reports that the vulnerability affects the following Conext ComBox solar battery monitor:
Successful exploitation of this vulnerability could cause the device to self-reboot, constituting a denial of service.
Schneider Electric has released a new version of firmware (V3.03 BN 830) to address this vulnerability. It is available to be downloaded from the following location:
Users can learn more about this vulnerability and the associated firmware fix by reading Schneider Electric’s security notification SEVD-2017-052-01 on their web site at the following location:
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
ICS-CERT also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available in the ICS‑CERT Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to ICS-CERT for tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability. This vulnerability is remotely exploitable. Low skill level is needed to exploit.
A series of rapid requests to the device may cause it to reboot.
Arik Kublanov and Mark Liapustin of Nation-E Ltd reported this vulnerability.
Critical Infrastructure Sector: Energy
Areas Deployed: Worldwide
Company Headquarters Location: Paris, France