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
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
71.1%
Successful exploitation of these vulnerabilities could allow arbitrary file write access with system access, start or stop service, allow remote code execution, and limit system availability.
The following versions of Opto 22 SoftPAC Project, a virtual PLC, are affected:
Paths specified within the zip files used to update the SoftPAC firmware are not sanitized. As a result, an attacker with user privileges can gain arbitrary file write access with system access.
CVE-2020-12042 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).
SoftPACβs firmware filesβ signatures are not verified upon firmware update. This allows an attacker to replace legitimate firmware files with malicious files.
CVE-2020-12046 has been assigned to this vulnerability. A CVSS v3 base score of 5.7 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N).
SoftPACAgent communicates with SoftPACMonitor over network Port 22000. However, this port is open without any restrictions. This allows an attacker with network access to control the SoftPACAgent service including updating SoftPAC firmware, starting or stopping service, or writing to certain registry values.
CVE-2020-10612 has been assigned to this vulnerability. A CVSS v3 base score of 9.1 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H).
SoftPAC does not specify the path of multiple imported .dll files. Therefore, an attacker can replace them and execute code whenever the service starts.
CVE-2020-10616 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N).
SoftPAC communication does not include any credentials. This allows an attacker with network access to directly communicate with SoftPAC, including, for example, stopping the service remotely.
CVE-2020-10620 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Mashav Sapir of Claroty reported these vulnerabilities to CISA.
Opto 22 released PAC Project 10.3; it is available for download by selecting one of the following links:
Questions concerning this release can be emailed to: [email protected]
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.gov. 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 webpage on us-cert.gov in the Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
No known public exploits specifically target these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-10612
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-10616
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-10620
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12042
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12046
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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
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
71.1%