CVE-2022-37434 ABB CVE debrief

Who should care

Operators, administrators, and security teams responsible for ABB ARM600 / ABB M2M Gateway deployments, especially where the device is reachable from untrusted networks or processes externally supplied compressed data.

Technical summary

The underlying issue is in zlib through 1.2.12 and affects inflate() in inflate.c when handling a large gzip header extra field. The resulting memory-safety failure can manifest as a heap-based buffer over-read or buffer overflow. Per the supplied advisory, ABB product exposure covers ARM600 firmware 4.1.2 <= 5.0.3 and ABB M2M Gateway SW 5.0.1 <= 5.0.3. The CVSS vector supplied is AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating network-reachable impact with low attack complexity and required low privileges.

Defensive priority

High. Prioritize if the ABB ARM600 or related SW is deployed in environments that accept untrusted inputs or are internet-facing, because the vulnerability can affect confidentiality, integrity, and availability.

Recommended defensive actions

• Reduce exposure to untrusted networks: avoid exposing system components to the internet; if internet access is necessary, expose only the VPN port.
• Use a private cellular APN where possible so remote traffic does not traverse the public internet.
• Place any internet-terminated connectivity in a DMZ and segregate it from other networks with a firewall.
• Apply strict firewall allowlisting and block all non-required ports and protocols.
• Change default credentials to strong, non-reused passwords and restrict administrator/root use to tasks that require it.
• Keep supporting PCs and engineering systems updated; virus-scan configuration PCs and transferred firmware/configuration files before introducing them to the OT environment.
• Maintain and validate backups for configurations and applicable system components, and store backups securely with role-based access control.
• Use continuous monitoring and intrusion detection/prevention where feasible, and follow ABB cyber security deployment guidance and user manuals for hardening and lifecycle practices.

Evidence notes

The vulnerability summary comes from the supplied CISA CSAF advisory content and its mirrored references. The advisory ties CVE-2022-37434 to ABB M2M Gateway ARM600 and ABB M2M Gateway SW, with the affected version ranges explicitly listed in the source item metadata. The remediation guidance in the source item is focused on exposure reduction, network segmentation, credential hygiene, monitoring, backups, and hardening; no fixed version or patch instruction is stated in the provided corpus.

Official resources