CVE-2022-4046 in Control
Summary
by MITRE • 08/03/2023
In CODESYS Control in multiple versions a improper restriction of operations within the bounds of a memory buffer allow an remote attacker with user privileges to gain full access of the device.
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Analysis
by VulDB Data Team • 08/03/2023
The vulnerability identified as CVE-2022-4046 affects CODESYS Control software across multiple versions, representing a critical security flaw that enables remote attackers with basic user privileges to achieve complete device compromise. This issue stems from inadequate memory buffer management within the software implementation, creating a pathway for unauthorized access that bypasses normal security controls. The vulnerability specifically manifests through improper restrictions on operations within memory boundaries, allowing attackers to manipulate buffer contents beyond their intended limits.
The technical nature of this flaw aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which addresses out-of-bounds read vulnerabilities. These classifications indicate that the vulnerability occurs when the system fails to properly validate buffer boundaries during memory operations, enabling attackers to write data beyond allocated memory regions. The remote exploitation capability means that attackers do not require physical access to the device, making this vulnerability particularly dangerous in industrial control environments where network connectivity is essential for operation.
From an operational impact perspective, this vulnerability represents a severe threat to industrial systems that rely on CODESYS Control for automation and control functions. The ability to gain full device access through user privileges undermines the fundamental security model of these systems, potentially allowing attackers to modify control logic, disrupt operations, or gain persistence within network environments. The implications extend beyond simple privilege escalation as the compromised device could serve as a foothold for broader network infiltration attacks, aligning with ATT&CK technique T1078 for valid accounts and T1566 for credential harvesting.
The exploitation of this vulnerability typically involves crafting malicious input that triggers buffer overflow conditions within the CODESYS Control software, potentially through network protocols or configuration interfaces. Attackers may leverage this to execute arbitrary code, modify system parameters, or establish persistent access mechanisms. The remote nature of the attack means that industrial control systems may be vulnerable even when physically secured, as network connectivity provides the attack surface. Organizations using CODESYS Control should consider implementing network segmentation, access controls, and regular security assessments to mitigate the risk of exploitation.
Mitigation strategies should include immediate application of vendor-provided patches and updates to address the buffer overflow conditions. Network administrators should implement strict access controls and monitoring for unusual network activity related to CODESYS Control services. The vulnerability also highlights the importance of secure coding practices in industrial control systems, emphasizing the need for proper input validation and memory management. Regular security assessments and vulnerability scanning should be conducted to identify similar issues within other industrial control software components. Organizations should also consider implementing intrusion detection systems specifically configured to monitor for exploitation attempts targeting industrial control protocols and software vulnerabilities.