CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
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
70.8%
Successful exploitation of these vulnerabilities could crash the device, execute arbitrary code, and allow access to sensitive information.
Moxa reports the vulnerabilities affect the following Ethernet switches:
The attacker may execute arbitrary codes or target the device, causing it to go out of service.
CVE-2020-7007 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).
The affected products use a weak cryptographic algorithm, which may allow confidential information to be disclosed.
CVE-2020-7001 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
The affected products use a hard-coded cryptographic key, increasing the possibility that confidential data can be recovered.
CVE-2020-6979 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).
An attacker may gain access to the system without proper authentication.
CVE-2020-6981 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).
Some of the parameters in the setting pages do not ensure text is the correct size for its buffer.
CVE-2020-6999 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:N/A:H).
Sensitive information is transmitted over some web applications in cleartext.
CVE-2020-6997 has been assigned to this vulnerability. A CVSS v3 base score of 4.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N).
Weak password requirements may allow an attacker to gain access using brute force.
CVE-2020-6991 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).
Ilya Karpov and Evgeniy Druzhinin from Rostelecom-Solar and Georgy Zaytsev of Positive Technologies reported these vulnerabilities to Moxa.
Moxa has developed the following solutions to address the vulnerabilities:
Please see Moxa’s security advisory for more information.
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-12-146-01B–Targeted 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-2020-6979
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-6981
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-6991
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-6997
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-6999
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7001
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7007
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
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www.us-cert.gov/sites/default/files/publications/emailscams_0905.pdf
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CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
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
70.8%