7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.002 Low
EPSS
Percentile
57.1%
**ATTENTION:**Exploitable remotely/low skill level to exploit.
Vendor: OSIsoft
Equipment: PI Web API
Vulnerabilities: Permissions, Privileges, and Access Controls; Cross-site Scripting
OSIsoft reports that the vulnerabilities affect the following PI Web API products:
PI Web API versions 2017 R2 and prior
NOTE: Not all configurations of PI Web API listed above are affected. Please see the OSIsoft alerts referenced in the Mitigation section.
Successful exploitation of these vulnerabilities could allow escalated privileges and may allow remote code execution.
OSIsoft recommends that users upgrade to PI Vision 2017 R2 Update 1 or PI AF Services 2017 R2 Update 1, which both address the PI Web API vulnerabilities. OBtain the updates from OSIsoft.
OSIsoft has released the following alerts:
<https://techsupport.osisoft.com/Troubleshooting/Alerts/AL00337>
<https://techsupport.osisoft.com/Troubleshooting/Alerts/AL00336>
NCCIC recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
NCCIC 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 NCCIC Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT website.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
Privileges may be escalated, giving attackers access to the PI System via the service account.
CVE-2018-7500 has been assigned to this vulnerability. A CVSS v3 base score of 9.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N).
Cross-site scripting may occur when input is incorrectly neutralized.
CVE-2018-7508 has been assigned to this vulnerability. A CVSS v3 base score of 4.7 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N).
OSIsoft self-reported the vulnerabilities to NCCIC.
Critical Infrastructure Sectors: Multiple Sectors
Countries/Areas Deployed: Worldwide
Company Headquarters Location: United States
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7500
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7508
cwe.mitre.org/data/definitions/264.html
cwe.mitre.org/data/definitions/79.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
techsupport.osisoft.com/Troubleshooting/Alerts/AL00336
techsupport.osisoft.com/Troubleshooting/Alerts/AL00337
twitter.com/CISAgov
twitter.com/intent/tweet?text=OSIsoft%20PI%20Web%20API+https://www.cisa.gov/news-events/ics-advisories/icsa-18-072-04
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
www.facebook.com/sharer/sharer.php?u=https://www.cisa.gov/news-events/ics-advisories/icsa-18-072-04&title=OSIsoft%20PI%20Web%20API
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
www.instagram.com/cisagov
www.linkedin.com/company/cybersecurity-and-infrastructure-security-agency
www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-18-072-04
www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-18-072-04
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=OSIsoft%20PI%20Web%20API&body=www.cisa.gov/news-events/ics-advisories/icsa-18-072-04
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.002 Low
EPSS
Percentile
57.1%