CVE-2023-3242: Improper initialization implementation in Portmapper used in B&R Industrial Automation Automation Runtime <G4.

Q: How do I fix CVE-2023-3242?

automation runtime: upgrade to g4.93. Exact commands for each OS are on this page.

Q: Is CVE-2023-3242 being exploited?

CVE-2023-3242 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-3242 affect?

CVE-2023-3242 affects automation runtime. Severity is high (CVSS 8.6). 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.

Q: How urgent is CVE-2023-3242?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 8.6REMOTEUPGRADE

CVE-2023-3242 is a high-severity flaw (CVSS 8.6) affecting automation runtime. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-665, CWE-770
Published	2023-07-26
Last modified	2026-06-17

Publisher (CNA): Asea Brown Boveri Ltd. (ABB) · Vendor: br-automation

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-07-26 18:15 UTCPublished CVE record published
2026-06-17 06:13 UTCUpdated Record last modified

br-automation automation runtime UPGRADE

Affected: < g4.93

Fixed in: g4.93

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy automation-runtime || rpm -q automation-runtime || automation-runtime --version

2. UPGRADE to g4.93 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade automation-runtime

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade automation-runtime

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-3242?

automation runtime: upgrade to g4.93. Exact commands for each OS are on this page.

Is CVE-2023-3242 being exploited?

CVE-2023-3242 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-3242 affect?

CVE-2023-3242 affects automation runtime. Severity is high (CVSS 8.6). 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.

How urgent is CVE-2023-3242?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-5800 HIGH 7.5 UPGRADE Diffie-Hellman groups with insufficient strength are used in the SSL/TLS stack of B&R Automation Runtime versi

References

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