CVE-2018-8843 in Automation Arena
Summary
by MITRE
Rockwell Automation Arena versions 16.10.00 and prior contains a use after free vulnerability caused by processing specially crafted Arena Simulation Software files that may cause the software application to crash, potentially losing any unsaved data.
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Analysis
by VulDB Data Team • 02/05/2020
The vulnerability identified as CVE-2018-8843 represents a critical use after free flaw within Rockwell Automation Arena software versions 16.10.00 and earlier. This issue manifests when the application processes specially crafted simulation files that contain malformed data structures, leading to memory management errors during file parsing operations. The vulnerability stems from improper handling of memory allocation and deallocation sequences within the software's file processing engine, creating opportunities for memory corruption that can be exploited by malicious actors.
The technical implementation of this vulnerability falls under CWE-416, which specifically addresses use after free conditions in software applications. When Arena processes maliciously crafted simulation files, the application allocates memory for various data structures representing the simulation elements, but fails to properly validate or manage the lifecycle of these memory regions. This improper memory management allows attackers to manipulate the application's behavior by controlling the contents of freed memory blocks, potentially leading to arbitrary code execution or denial of service conditions. The flaw occurs during the parsing phase of simulation files where the software does not adequately validate input data before attempting to reuse allocated memory segments.
The operational impact of this vulnerability extends beyond simple application instability, as it creates significant risks for industrial automation environments where Arena is commonly deployed. Organizations utilizing these older versions face potential data loss scenarios when applications crash during critical simulation operations, which could disrupt production planning and system development workflows. The vulnerability particularly affects environments where users regularly import third-party simulation files or where automated processes might trigger file processing operations. Additionally, the crash conditions can result in loss of unsaved work, requiring users to restart their simulation sessions and potentially losing hours of productivity.
Mitigation strategies for CVE-2018-8843 should prioritize immediate software updates to versions that address the memory management flaws in the file processing components. Organizations should implement strict file validation procedures before importing simulation files, particularly those originating from external sources or untrusted environments. Network segmentation and access controls can help limit exposure by restricting who can initiate file processing operations within the Arena environment. Security monitoring should include detection of unusual application crash patterns or memory allocation behaviors that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1203, which covers exploitation of software vulnerabilities for privilege escalation or system compromise, making it essential for organizations to maintain updated software inventories and implement comprehensive patch management processes to prevent potential exploitation of this use after free condition.