CVE-2023-32233 ABB CVE debrief

Who should care

ABB ARM600 operators, OT/ICS defenders, site administrators, and security teams responsible for Linux-based gateway hosts or any environment where local user access exists on affected ABB M2M Gateway systems.

Technical summary

The source corpus describes CVE-2023-32233 as a Linux kernel use-after-free in Netfilter nf_tables during batch request processing, with potential arbitrary read and write of kernel memory and escalation from unprivileged local user to root. In the supplied CISA CSAF advisory ICSA-25-105-08, ABB identifies affected products as ABB M2M Gateway ARM600 firmware versions 4.1.2 through 5.0.3 and ABB M2M Gateway SW versions 5.0.1 through 5.0.3. The supplied CVSS vector is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating a local attack path with high impact.

Defensive priority

High

Recommended defensive actions

• Inventory ABB M2M Gateway ARM600 and ABB M2M Gateway SW assets and confirm whether they fall within the affected version ranges listed in the advisory.
• Reduce exposure by avoiding internet-facing deployments; where remote connectivity is needed, restrict access to the minimum required VPN port and prefer a private APN or segmented DMZ architecture.
• Apply firewall allowlisting and network segmentation so only required hosts, ports, and protocols can reach the gateway services.
• Change any default credentials, remove unnecessary user accounts, and enforce least privilege for administrative access.
• Follow ABB’s product security deployment guidance and user manuals for installation, operation, backup, and decommissioning practices.
• Keep supporting engineering/configuration PCs patched and malware-scanned before they are connected to OT environments, and scan transferred configuration or firmware files.
• Enable continuous monitoring and review logs for abnormal local activity, crashes, or privilege-escalation indicators on affected hosts.
• Verify whether ABB has issued newer remediation guidance for your exact product and firmware/software version, and plan maintenance changes accordingly.

Evidence notes

Primary evidence comes from the supplied CISA CSAF advisory ICSA-25-105-08, published 2025-04-07, and its ABB references. The advisory identifies CVE-2023-32233 as affecting ABB M2M Gateway ARM600 firmware 4.1.2 through 5.0.3 and ABB M2M Gateway SW 5.0.1 through 5.0.3, while the source item description provides the Linux kernel nf_tables use-after-free impact statement. The advisory’s remediation section emphasizes network isolation, allowlisting, credential hygiene, monitoring, and hardening. No KEV listing is present in the supplied enrichment.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.