Improper initialization implementation in Portmapper used in B&R Industrial Automation Automation Runtime <G4.93 allows unauthenticated net…

published 2023-07-26 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-43918

cvss: 8.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits: 0; none known

Improper initialization implementation in Portmapper used in B&R Industrial Automation Automation Runtime <G4.93 allows unauthenticated network-based attackers to cause permanent denial-of-service conditions.

Patch / fix

fixed in 1

br-automation automation_runtime g4.93

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-10-23)

Exploit prediction

0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

B&R Industrial Automation B&R Automation Runtime

Classification

Weakness

CWE-770 Allocation of Resources Without Limits or Throttling
CWE-665 Improper Initialization

References

br-automation.com /downloads_br_productcatalogue/assets/1689787619746-en-original-1.0.pdf
vendor-advisory

Sources

CVE List CVE-2023-3242
NVD CVE-2023-3242

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Summary