ATTENTION: Remotely exploitable/Low skill level to exploit
Vendor: Schneider Electric
Equipment: Wonderware Historian
Vulnerability: Credentials Management
The following Wonderware Historian versions are affected:
Successful exploitation of this vulnerability could allow a malicious entity to compromise Historian databases. In some installation scenarios, SQL resources beyond those created by Wonderware Historian may be compromised as well.
Schneider Electric strongly recommends that the following steps be taken to mitigate this vulnerability:
For an increased level of security, Schneider Electric and Microsoft further advise that connectivity to SQL Server be accomplished with Windows Integrated Security as opposed to using native SQL logins.
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. 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 not remotely exploitable. Low skill level is needed to exploit.
Wonderware Historian creates logins with default passwords, which can allow a malicious entity to compromise Historian databases. In some installation scenarios, resources beyond those created by Wonderware Historian may be compromised as well.
Ruslan Habalov and Jan Bee of the Google ISA Assessments Team discovered this vulnerability.