CVE-2023-31151: Improper Certificate Validation

Severity: medium (CVSS 4.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-05-10 · updated 2026-06-17
Weakness: CWE-295

Description

An Improper Certificate Validation vulnerability in the Schweitzer Engineering Laboratories Real-Time Automation Controller (SEL RTAC) Web Interface could allow a remote unauthenticated attacker to conduct a man-in-the-middle (MitM) attack. See SEL Service Bulletin dated 2022-11-15 for more details.

Affected products

Selinc Sel-2241 Rtac Module Firmware: from r147-v0 before r150-v2 — fixed in r150-v2
Selinc Sel-3350 Firmware: from r148-v0 before r150-v2 — fixed in r150-v2
Selinc Sel-3505-3 Firmware: from r147-v0 before r150-v2 — fixed in r150-v2
Selinc Sel-3505 Firmware: from r147-v0 before r150-v2 — fixed in r150-v2
Selinc Sel-3530-4 Firmware: from r147-v0 before r150-v2 — fixed in r150-v2
Selinc Sel-3530 Firmware: from r147-v0 before r150-v2 — fixed in r150-v2
Selinc Sel-3532 Firmware: from r147-v0 before r150-v2 — fixed in r150-v2
Selinc Sel-3555 Firmware: from r147-v0 before r150-v2 — fixed in r150-v2
Selinc Sel-3560E Firmware: from r147-v0 before r150-v2 — fixed in r150-v2
Selinc Sel-3560S Firmware: from r147-v0 before r150-v2 — fixed in r150-v2

How to fix

Upgrade to a fixed version: Selinc Sel-2241 Rtac Module Firmware r150-v2; Selinc Sel-3350 Firmware r150-v2; Selinc Sel-3505-3 Firmware r150-v2; Selinc Sel-3505 Firmware r150-v2; Selinc Sel-3530-4 Firmware r150-v2; Selinc Sel-3530 Firmware r150-v2; Selinc Sel-3532 Firmware r150-v2; Selinc Sel-3555 Firmware r150-v2; Selinc Sel-3560E Firmware r150-v2; Selinc Sel-3560S Firmware r150-v2. Check the vendor advisory for mitigations.

References

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