Successful exploitation of these vulnerabilities could crash the device or allow access to sensitive information.
Moxa reports these vulnerabilities affect the following Ethernet switches:
A buffer overflow in the web server allows remote attackers to cause a denial-of-service condition or execute arbitrary code.
The affected products use a weak cryptographic algorithm, which may allow confidential information to be disclosed.
The affected products use a hard-coded cryptographic key, which increases the possibility that confidential data can be recovered.
These devices use a hard-coded service code for access to the console.
The application utilizes weak password requirements, which may allow an attacker to gain unauthorized access.
An attacker can access to sensitive information from the web service without authorization.
Ilya Karpov and Evgeniy Druzhinin from Rostelecom-Solar and Georgy Zaytsev of Positive Technologies reported these vulnerabilities to Moxa.
Moxa has developed a solution to address these vulnerabilities: Please contact Moxa Technical Support for a security patch.
Moxa also recommends that users apply the security patch and enable “Account Login Failure Lockout” functions to eliminate any potential risk.
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.
For any questions related to this report, please contact the CISA at:
Toll Free: 1-888-282-0870
For industrial control systems cybersecurity information: https://us-cert.cisa.gov/ics
or incident reporting: https://us-cert.cisa.gov/report
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