CVE-2022-43765: DoS in APROLs Tbase server

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-02-08 · updated 2026-06-17
Weakness: CWE-252

Description

B&R APROL versions < R 4.2-07 doesn’t process correctly specially formatted data packages sent to port 55502/tcp, which may allow a network based attacker to cause an application Denial-of-Service.

Affected products

B&R Industrial Automation B&R APROL: before r4.2-07 — fixed in r4.2-07

How to fix

Upgrade to a fixed version: B&R Industrial Automation B&R APROL r4.2-07. Check the vendor advisory for mitigations.

References

https://www.br-automation.com/downloads_br_productcatalogue/assets/1674823095245-en-original-1.0.pdf
https://www.br-automation.com/downloads_br_productcatalogue/assets/1674823095245-en-original-1.0.pdf

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