Skip to content
Fencer Vulns
critical 10.0

CVE-2023-42770 json

Red Lion Controls Sixnet RTU Authentication Bypass Using An Alternative Path Or Channel

published 2023-11-21 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-47202

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

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.

Patch / fix

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-23-320-01 updated cvss 10.0

Red Lion Sixnet RTUs

  • Red Lion ST-IPm-6350 >=4.9.114 Red Lion ST-IPm-8460 >=6.0.202 Red Lion VT-IPm2m-113-D >=4.9.114 Red Lion VT-IPm2m-213-D >=4.9.114 Red Lion VT-mIPm-135-D >=4.9.114 Red Lion VT-mIPm-245-D >=4.9.114
    affected: vendor fix, mitigation “Red Lion recommends users to apply the latest patches to their products.” support.redlion.net

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.88% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Red Lion Controls ST-IPm-8460
  • Red Lion Controls ST-IPm-6350
  • Red Lion Controls VT-mIPm-135-D
  • Red Lion Controls VT-mIPm-245-D
  • Red Lion Controls VT-IPm2m-213-D
  • Red Lion Controls VT-IPm2m-113-D

Classification

Weakness
  • CWE-288 Authentication Bypass Using an Alternate Path or Channel
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.