Summary
Successful exploitation of these vulnerabilities could allow an attacker to access sensitive information, reboot the UR, gain privileged access, or cause a denial-of-service condition.
Vulnerabilities 10
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Critical 9.8
GE UR family insecure default variable initialization
GE UR IED firmware versions prior to version 8.1x with “Basic” security variant does not allow the disabling of the “Factory Mode,” which is used for servicing the IED by a “Factory” user.
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Critical 9.8
GE UR family Unrestricted Upload of File with Dangerous Type
GE UR IED firmware versions prior to version 8.1x supports upgrading firmware using UR Setup configuration tool – Enervista UR Setup. This UR Setup tool validates the authenticity and integrity of firmware file before uploading the UR IED. An illegitimate use…
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High 8.4
GE UR family hardcoded credentials
GE UR bootloader binary Version 7.00, 7.01 and 7.02 included unused hardcoded credentials. Additionally, a user with physical access to the UR IED can interrupt the boot sequence by rebooting the UR.
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High 7.5
The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other protocols and products, have a b…
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High 7.5
GE UR family exposure of sensitive information to an unauthorized actor
GE UR firmware versions prior to version 8.1x web server interface is supported on UR over HTTP protocol. It allows sensitive information exposure without authentication.
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Medium 5.9
The RC4 algorithm, as used in the TLS protocol and SSL protocol, has many single-byte biases, which makes it easier for…
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Medium 5.3
GE UR family input validation
GE UR firmware versions prior to version 8.1x supports web interface with read-only access. The device fails to properly validate user input, making it possible to perform cross-site scripting attacks, which may be used to send a malicious script. Also, UR Fi…
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Medium 5.3
GE UR family input validation
GE UR firmware versions prior to version 8.1x web server task does not properly handle receipt of unsupported HTTP verbs, resulting in the web server becoming temporarily unresponsive after receiving a series of unsupported HTTP requests. When unresponsive, t…
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Medium 5.3
GE UR family exposure of sensitive information to an unauthorized actor
GE UR firmware versions prior to version 8.1x shares MODBUS memory map as part of the communications guide. GE was made aware a “Last-key pressed” MODBUS register can be used to gain unauthorized information.
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Unscored —
SSH 1.2.25, 1.2.23, and other versions, when used in in CBC (Cipher Block Chaining) or CFB (Cipher Feedback 64 bits) mo…
Revision history
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#2
Update A - revised advisory content into modern format.
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#1
Initial Publication
References
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ICSA Advisory ICSA-21-075-02 - Web Version
https://www.cisa.gov/news-events/ics-advisories/icsa-21-075-02
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Recommended Practices
https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
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Recommended Practices
https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
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Recommended Practices
https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf
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Recommended Practices
https://www.cisa.gov/topics/industrial-control-systems
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Recommended Practices
https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01
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Recommended Practices
https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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Recommended Practices
https://www.cisa.gov/news-events/news/targeted-cyber-intrusion-detection-and-mitigation-strategies-update-b
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Recommended Practices
https://www.cisa.gov/secure-our-world/teach-employees-avoid-phishing
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Recommended Practices
https://www.cisa.gov/news-events/news/avoiding-social-engineering-and-phishing-attacks