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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9 High
AI Score
Confidence
High
0.005 Low
EPSS
Percentile
76.5%
Successful exploitation of this vulnerability could allow an attacker to obtain unauthorized access to the internal product LAN, which could result in exposure of sensitive information, denial of service, and remote code execution when access to a resource from an attacker is not restricted or incorrectly restricted.
Schneider Electric reports this vulnerability affects the following firmware versions of the Easergy T300 products:
The affected product is vulnerable to a missing authentication for critical function vulnerability, which may allow an attacker to expose information, cause a denial-of-service condition, and remotely execute arbitrary code.
CVE-2020-7561 has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H).
The affected product is vulnerable to a missing authorization vulnerability, which may allow an attacker to gain access to sensitive information, cause a denial-of-service condition, and remotely execute arbitrary code when access control checks are not applied consistently.
CVE-2020-28215 has been assigned to this vulnerability. A CVSS v3 base score of 7.7 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H).
The affected product is vulnerable to a missing encryption of sensitive data vulnerability, which may allow an attacker to read network traffic over HTTP protocol.
CVE-2020-28216 has been assigned to this vulnerability. A CVSS v3 base score of 7.6 has been calculated; the CVSS vector string is (AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).
The affected product is vulnerable to a missing encryption of sensitive data vulnerability, which may allow an attacker to read network traffic over IEC60870-5-104 protocol.
CVE-2020-28217 has been assigned to this vulnerability. A CVSS v3 base score of 6.7 has been calculated; the CVSS vector string is (AV:P/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:L).
The affected product is vulnerable due to an improper restriction of rendered UI layers or frames vulnerability, which may allow an attacker to trick a user into initiating an unintended action.
CVE-2020-28218 has been assigned to this vulnerability. A CVSS v3 base score of 6.3 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:L).
Evgeniy Druzhinin and IIya Karpov of Rostelecom-Solar and an anonymous researcher reported these vulnerabilities to Schneider Electric.
Schneider Electric recommends users upgrade to v2.7.1, which is available from the Schneider Electric Customer Care Center. Alternatively, users may disable port forwarding in the product firewall.
Schneider Electric strongly recommends the following industry cybersecurity best practices:
For more information refer to the Schneider Electric Recommended Cybersecurity Best Practices document.
Refer to Schneider Electricβs security bulletin SEVD-2020-315-06 for specific mitigation details.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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.cisa.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.cisa.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.
No known public exploits specifically target this vulnerability. High skill level is needed to exploit.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-28215
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-28216
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-28217
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-28218
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7561
cwe.mitre.org/data/definitions/1021.html
cwe.mitre.org/data/definitions/306.html
cwe.mitre.org/data/definitions/311.html
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cwe.mitre.org/data/definitions/862.html
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us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9 High
AI Score
Confidence
High
0.005 Low
EPSS
Percentile
76.5%