CVE-2011-4532 in Automation License Manager
Summary
by MITRE
Absolute path traversal vulnerability in the ALMListView.ALMListCtrl ActiveX control in almaxcx.dll in the graphical user interface in Siemens Automation License Manager (ALM) 2.0 through 5.1+SP1+Upd2 allows remote attackers to overwrite arbitrary files via the Save method.
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Analysis
by VulDB Data Team • 04/05/2025
The CVE-2011-4532 vulnerability represents a critical absolute path traversal flaw in Siemens Automation License Manager's ALMListView.ALMListCtrl ActiveX control, specifically within the almaxcx.dll component. This vulnerability exists in the graphical user interface of Siemens ALM versions ranging from 2.0 through 5.1+SP1+Upd2, making it a persistent issue affecting multiple iterations of the software. The flaw manifests through the Save method of the ActiveX control, which fails to properly validate file paths, creating an opportunity for attackers to manipulate the file system through crafted input parameters.
The technical implementation of this vulnerability stems from inadequate input validation within the ActiveX control's file handling mechanisms. When the Save method processes user-supplied paths, it does not properly sanitize or restrict the absolute paths that can be specified, allowing attackers to bypass normal file system access controls. This weakness enables an attacker to specify arbitrary absolute paths that point to system-critical files or locations outside the intended application scope. The vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal attacks. The attack vector leverages the ActiveX control's inherent trust within the Windows environment, where such controls are often executed with elevated privileges, amplifying the potential impact.
Operationally, this vulnerability poses significant risks to industrial control systems and automation environments where Siemens ALM is deployed. Attackers can exploit this weakness to overwrite critical system files, configuration data, or even executable components that could lead to complete system compromise. The remote nature of the attack means that adversaries do not require local access to the system, making it particularly dangerous in networked environments where automation systems are exposed to external threats. This vulnerability directly impacts the integrity and availability of industrial automation infrastructure, potentially causing operational disruptions, data corruption, or unauthorized access to critical control systems. The implications extend beyond simple file overwrites, as the ability to manipulate system files can lead to privilege escalation, persistent backdoors, or complete system takeover scenarios.
The mitigation strategies for CVE-2011-4532 should prioritize immediate patching of affected Siemens ALM versions, with administrators applying the latest available updates from Siemens. Organizations should implement strict ActiveX control restrictions through group policy settings, disabling unnecessary ActiveX controls in web browsers and limiting their execution to trusted environments only. Network segmentation and firewall rules should be configured to restrict access to systems running ALM software, particularly when the software is exposed to untrusted networks. Additionally, implementing application whitelisting controls and disabling unnecessary file system write operations for the ALM application can significantly reduce the attack surface. From an ATT&CK framework perspective, this vulnerability maps to techniques involving file system permissions manipulation and privilege escalation, with the attack chain typically following T1059 for execution and T1070 for file modification. Regular security assessments and vulnerability scanning should be conducted to identify and remediate similar issues in industrial control systems, as this vulnerability demonstrates the persistent nature of path traversal flaws in legacy industrial software components.