What’s Vulnerable › Vulnerabilities

CVE-2023-42770: Red Lion Controls Sixnet RTU Authentication Bypass Using An Alternative Path Or Channel

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-21 · updated 2026-06-17
• Weakness: CWE-288

Description

Red Lion SixTRAK and VersaTRAK Series RTUs with authenticated users enabled (UDR-A) any Sixnet UDR message will meet an authentication challenge over UDP/IP. When the same message is received over TCP/IP the RTU will simply accept the message with no authentication challenge.

Affected products

• Redlioncontrols St-Ipm-6350 Firmware: 4.9.114
• Redlioncontrols St-Ipm-8460 Firmware: 6.0.202
• Redlioncontrols Vt-Ipm2M-113-D Firmware: 4.9.114
• Redlioncontrols Vt-Ipm2M-213-D Firmware: 4.9.114
• Redlioncontrols Vt-Mipm-135-D Firmware: 4.9.114
• Redlioncontrols Vt-Mipm-245-D Firmware: 4.9.114

References

• https://https://support.redlion.net/hc/en-us/articles/19339209248269-RLCSIM-2023-05-Authentication-Bypass-and-Remote-Code-Execution
• https://www.cisa.gov/news-events/ics-advisories/icsa-23-320-01
• https://https://support.redlion.net/hc/en-us/articles/19339209248269-RLCSIM-2023-05-Authentication-Bypass-and-Remote-Code-Execution
• https://www.cisa.gov/news-events/ics-advisories/icsa-23-320-01

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