CVE-2014-4683 in WinCC
Summary
by MITRE
The WebNavigator server in Siemens SIMATIC WinCC before 7.3, as used in PCS7 and other products, allows remote authenticated users to gain privileges via a (1) HTTP or (2) HTTPS request.
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Analysis
by VulDB Data Team • 03/26/2022
The vulnerability identified as CVE-2014-4683 affects Siemens SIMATIC WinCC versions prior to 7.3, specifically within the WebNavigator server component that is integral to PCS7 and other industrial automation products. This flaw represents a critical privilege escalation vulnerability that enables authenticated remote attackers to elevate their access rights within the system. The vulnerability exists in the web-based administrative interface of the WinCC platform, which is commonly deployed in industrial control systems and supervisory control and data acquisition environments where operational technology security is paramount.
The technical implementation of this vulnerability stems from inadequate access control mechanisms within the WebNavigator server implementation. Attackers who have already established legitimate authentication credentials can exploit this weakness by crafting specific HTTP or HTTPS requests that manipulate the privilege levels associated with their authenticated sessions. The flaw essentially allows an authenticated user to bypass normal authorization checks and gain elevated privileges that should otherwise be restricted to administrative personnel. This type of vulnerability falls under the CWE-264 category of "Permissions, Privileges, and Access Controls" and represents a significant weakness in the principle of least privilege enforcement within industrial control systems.
The operational impact of this vulnerability is particularly severe in industrial environments where Siemens WinCC systems are deployed for process control and monitoring. An attacker who successfully exploits this privilege escalation flaw could potentially gain full administrative access to the control system, allowing them to modify process parameters, alter operational settings, or even disrupt critical manufacturing processes. The remote nature of the attack means that adversaries do not require physical access to the system or direct network connectivity to the industrial control network, making the attack surface significantly broader. This vulnerability directly aligns with ATT&CK technique T1068 which covers "Exploitation for Privilege Escalation" and demonstrates how weaknesses in industrial control system security can be leveraged to compromise operational integrity.
Organizations utilizing affected Siemens WinCC systems should immediately implement the vendor-provided security patches and updates that address this privilege escalation vulnerability. System administrators should also conduct comprehensive access control reviews to ensure that only authorized personnel have the necessary privileges within the system. Network segmentation strategies should be reinforced to limit the potential impact of successful exploitation, and monitoring should be enhanced to detect unusual authentication patterns or privilege changes. Additionally, regular security assessments of industrial control systems should be performed to identify similar vulnerabilities that could compromise the integrity of critical infrastructure operations. The vulnerability highlights the importance of maintaining current security patches in industrial environments where system availability and security are critical factors for operational continuity and safety.