Vendor: OSIsoft
Equipment: PI Coresight, PI Web API
Vulnerability: Information Exposure Through Server Log Files
OSIsoft reports that the vulnerability affects the following versions:
Anyone with access to the server file system can obtain the service account passwords for the affected services. This is accomplished by examining the installation log file when a nondefault service account and password are specified during installation or upgrade. This potentially leads to unauthorized shutdown of the affected PI services as well as potential reuse of domain credentials.
The recommendation is to follow the workaround detailed in the security bulletin until a software update is available.
The security bulletin with detailed workaround can be found at:
<https://techsupport.osisoft.com/Troubleshooting/Alerts/AL00312>
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 ICSβCERT Technical Information Paper, ICS-TIP-12-146-01BβTargeted 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.
In addition, ICS-CERT recommends that users take the following measures to protect themselves from social engineering attacks:
No known public exploits specifically target this vulnerability. Not remotely exploitable. Low skill level is needed to exploit.
An information exposure through server log files vulnerability has been identified, which may allow service account passwords to become exposed for the affected services, potentially leading to unauthorized shutdown of the affected PI services as well as potential reuse of domain credentials.
CVE-2017-5153 has been assigned to this vulnerability. A CVSS v3 base score of 6.1 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H).
Vint Maggs from Savannah River Nuclear Solutions reported this issue to OSIsoft.
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