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PatchSiren cyber security CVE debrief

CVE-2024-11609 AutomationDirect CVE debrief

A stack-based buffer overflow vulnerability in AutomationDirect C-More EA9 Programming Software allows remote code execution through malicious file parsing. The flaw exists in versions 6.78 and earlier, where improper input validation during file processing can lead to arbitrary code execution with the privileges of the running application. This vulnerability requires local access with user interaction, as an attacker must convince a user to open a crafted file. The CVSS 3.1 score of 7.8 reflects high impacts to confidentiality, integrity, and availability. CISA published advisory ICSA-24-340-01 on December 5, 2024, coordinating disclosure with the vendor. AutomationDirect has released version 6.79 to address this vulnerability.

Vendor
AutomationDirect
Product
C-More EA9 Programming Software
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2024-12-05
Original CVE updated
2024-12-05
Advisory published
2024-12-05
Advisory updated
2024-12-05

Who should care

Organizations using AutomationDirect C-More EA9 HMI systems in industrial environments, particularly manufacturing, process control, and building automation sectors. Security teams responsible for OT/ICS asset protection, engineering workstation hardening, and supply chain security should prioritize this vulnerability due to the critical role of programming software in maintaining control system integrity.

Technical summary

The vulnerability is a stack-based buffer overflow occurring during file parsing operations in the C-More EA9 Programming Software. The flaw stems from insufficient bounds checking when processing crafted input files. Successful exploitation allows execution of arbitrary code within the context of the application. Attack vectors require local access and user interaction—specifically, opening a malicious file. The vulnerability does not require elevated privileges to exploit but results in high-impact outcomes including complete system compromise. No known public exploits or active exploitation in ransomware campaigns have been reported as of the December 5, 2024 advisory publication.

Defensive priority

high

Recommended defensive actions

  • Update C-More EA9 Programming Software to version 6.79 immediately.
  • If immediate patching is not feasible, disconnect affected workstations from external networks including internet and corporate LAN.
  • Use dedicated secure internal networks or air-gapped systems for communication with programmable devices.
  • Restrict physical and logical access to engineering workstations to authorized personnel only.
  • Implement multi-factor authentication and enforce robust password policies for all user accounts.
  • Deploy application whitelisting to permit only pre-approved trusted software execution.
  • Configure host-based firewalls to block unauthorized network access.
  • Enable comprehensive logging and monitoring of system activities with regular log review for anomalies.

Evidence notes

Vulnerability description and remediation guidance sourced from CISA CSAF advisory ICSA-24-340-01. Affected product versions and patch availability confirmed through vendor remediation instructions in the same advisory. CVSS vector and scoring details match official CISA publication.

Official resources

coordinated