CVE-2023-45234 TianoCore CVE debrief

Who should care

Organizations using ABB products APC4100, APC910, C80, MPC3100, PPC1200, PPC900, APC2200, PPC2200, APC3100, and PPC3100 should prioritize patching or applying recommended mitigations. Industrial control systems operators, cybersecurity teams, and IT administrators responsible for these systems should be aware of the vulnerability and take immediate action to protect against potential exploitation.

Technical summary

The vulnerability is caused by a buffer overflow in EDK2's Network Package when processing DNS Servers option from a DHCPv6 Advertise message. An attacker can exploit this vulnerability to gain unauthorized access and potentially lead to a loss of Confidentiality, Integrity, and/or Availability. The Common Vulnerability Scoring System (CVSS) score for this vulnerability is 8.3, indicating a high severity. ABB has released patches for some affected products, while others have mitigation measures recommended, such as deactivating the vulnerable component or limiting accessibility.

Defensive priority

High priority should be given to patching or applying recommended mitigations for CVE-2023-45234. Immediate action is necessary to protect against potential exploitation and minimize the risk of unauthorized access and data breaches.

Recommended defensive actions

• Apply patches for affected ABB products as soon as possible.
• Deactivate the vulnerable component if not needed.
• Limit accessibility to legitimate users and block illegitimate PXE traffic.
• Monitor network traffic and implement firewall rules to block IPv6 network traffic on the control network firewall.
• Review and update incident response plans to address potential exploitation.

Evidence notes

The CVE-2023-45234 vulnerability is documented in multiple sources, including CVE.org, NVD, and CISA's advisory. ABB has released patches for some affected products and recommends mitigation measures for others. The vulnerability affects multiple ABB products, and operators should prioritize patching or applying recommended mitigations.

Official resources