CVE-2014-5232 in SIMATIC WinCC Sm@rtClient
Summary
by MITRE
The Siemens SIMATIC WinCC Sm@rtClient app before 1.0.2 for iOS allows local users to bypass an intended application-password requirement by leveraging the running of the app in the background state.
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Analysis
by VulDB Data Team • 04/11/2022
The vulnerability identified as CVE-2014-5232 affects the Siemens SIMATIC WinCC Sm@rtClient mobile application version 1.0.1 and earlier for iOS devices. This application serves as a remote monitoring and control interface for industrial automation systems, specifically designed for use in manufacturing environments where operational technology security is paramount. The flaw resides in the application's authentication mechanism, which fails to properly enforce password requirements when the application operates in background states, creating a significant security gap in industrial control system security.
The technical implementation of this vulnerability stems from improper state management within the iOS application framework. When the WinCC Sm@rtClient app transitions to the background state, typically occurring when users switch to other applications or when the device screen locks, the application's authentication checks become ineffective. This behavior violates standard security practices for mobile applications handling sensitive industrial data, as it allows unauthorized access to the application's protected features without proper authentication. The flaw essentially creates a time window during which the application remains accessible without password verification, directly undermining the intended security controls.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential compromise of industrial control systems. In manufacturing environments, the WinCC Sm@rtClient application provides access to critical process controls and monitoring functions that could be exploited by malicious actors with physical access to iOS devices. Attackers could leverage this vulnerability to gain unauthorized access to industrial processes, potentially leading to operational disruptions, safety hazards, or even physical damage to equipment. The background execution state presents a particularly concerning attack vector since it can be triggered by simple device screen locking or user switching between applications, making exploitation trivial and potentially undetectable to system administrators.
This vulnerability aligns with CWE-613, which addresses insufficient session management, and demonstrates characteristics consistent with ATT&CK technique T1548.001 for Abuse of Functionality, where legitimate application features are misused to bypass security controls. The flaw represents a critical weakness in the application's security architecture, particularly concerning mobile application security in industrial environments where traditional network-based security measures may not be sufficient. Organizations using Siemens SIMATIC WinCC Sm@rtClient should immediately implement the available patch version 1.0.2 and consider additional security measures such as device encryption, application whitelisting, and network segmentation to mitigate potential exploitation. The vulnerability also highlights the importance of proper mobile application security testing, particularly for industrial control systems where security failures can have severe operational consequences.