CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
60.9%
CVSS v3 7.8
ATTENTION: Low skill level to exploit
Vendor: Schneider Electric
Equipment: Software Update (SESU)
Vulnerability: DLL hijacking
This updated advisory is a follow-up to the original advisory titled ICSA-18-305-02 Schneider Electric Software Update that was published November 1, 2018, on the NCCIC/ICS-CERT website.
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the target system.
Schneider Electric reports the vulnerability affects the following Software Update products:
--------- Begin Update A Part 1 of 2 --------
For a list of products that can optionally install the software, please see Schneider Electricโs security notice SEVD-2018-298-01 available at the following location:
<https://www.schneider-electric.com/en/download/document/SEVD-2018-298-01>
--------- End Update A Part 1 of 2 ----------
The product uses a fixed or controlled search path to find resources. An attacker with local access could place a specially crafted file on the target machine, which may give the attacker the ability to execute arbitrary code.
CVE-2018-7799 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
ADLab of Venustech reported this vulnerability to NCCIC.
--------- Begin Update A Part 2 of 2 --------
Schneider Electric Software Update will notify users of the availability of this update (Version 2.2.0), which addresses this vulnerability. Users should ensure they apply this update. In addition, the update can be downloaded at any time using the link below:
--------- End Update A Part 2 of 2 ----------
Schneider Electric recommends following industry cybersecurity best practices such as:
Schneider Electricโs security notice SEVD-2018-298-01 is available at the following location:
<https://www.schneider-electric.com/en/download/document/SEVD-2018-298-01>
NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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 on the ICS-CERT website in the Technical Information Paper, ICS-TIP-12-146-01BโTargeted Cyber Intrusion Detection and Mitigation Strategies.
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 this vulnerability. This vulnerability is not exploitable remotely.
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CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
60.9%