CVE-2016-8353 in PI Web API 2015 R2
Summary
by MITRE
An issue was discovered in OSIsoft PI Web API 2015 R2 (Version 1.5.1). There is a weakness in this product that may allow an attacker to access the PI system without the proper permissions.
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Analysis
by VulDB Data Team • 02/14/2017
The vulnerability identified as CVE-2016-8353 resides within OSIsoft PI Web API 2015 R2 version 1.5.1, representing a significant security weakness that compromises the integrity of access controls within industrial automation systems. This flaw specifically targets the authentication and authorization mechanisms that protect critical infrastructure data, potentially allowing unauthorized users to bypass legitimate permission checks and gain access to sensitive operational information. The vulnerability demonstrates a critical gap in the security architecture of industrial control systems where proper access validation fails to occur, creating an entry point for malicious actors seeking to exploit industrial environments.
This security weakness manifests as an insufficient authorization check within the PI Web API implementation, where the system fails to properly validate user credentials and permissions before granting access to system resources. The vulnerability enables what is known as privilege escalation or unauthorized access, where attackers can leverage the flaw to obtain elevated privileges or access restricted data without proper authentication. From a cybersecurity perspective, this represents a failure in the principle of least privilege, where users should only have access to resources necessary for their specific functions. The flaw operates at the application layer of the OSI model, affecting the web services interface that industrial operators use to interact with process control data.
The operational impact of CVE-2016-8353 extends beyond simple data access, as it potentially allows attackers to manipulate industrial processes or gain intelligence about critical infrastructure operations. This vulnerability directly impacts the confidentiality, integrity, and availability of industrial control systems, as unauthorized access could lead to process disruption, data manipulation, or the extraction of sensitive operational information that could be used for further attacks. The consequences are particularly severe in industrial environments where process control systems manage critical manufacturing processes, power generation, or other essential infrastructure operations. From an attack perspective, this vulnerability aligns with techniques described in the MITRE ATT&CK framework under the privilege escalation and credential access domains, specifically targeting the use of weak or bypassed authentication mechanisms.
The technical implementation of this vulnerability suggests that the PI Web API fails to properly enforce access control policies, potentially due to inadequate input validation or flawed session management. This weakness creates a pathway for attackers to exploit the system through various means including but not limited to session hijacking, credential stuffing, or direct API manipulation. The vulnerability classification aligns with CWE-284, which addresses improper access control in software implementations. Organizations implementing industrial automation systems must recognize that such vulnerabilities can serve as initial access points for more sophisticated attacks, potentially leading to the compromise of entire industrial control networks. The risk is compounded by the fact that many industrial environments lack the robust security monitoring and incident response capabilities found in traditional enterprise environments, making exploitation more dangerous and harder to detect.
Mitigation strategies for CVE-2016-8353 should include immediate patching of the affected PI Web API version, implementation of additional authentication layers, and enhanced monitoring of API access patterns. Organizations should also consider implementing network segmentation to limit access to industrial control systems, deploying intrusion detection systems specifically configured to monitor for suspicious API activity, and establishing comprehensive access control policies. The vulnerability highlights the importance of regular security assessments and vulnerability management programs within industrial environments, emphasizing that security should be integrated into the design and operation of industrial control systems rather than treated as an afterthought. Additionally, implementing multi-factor authentication and regular security training for personnel who interact with industrial control systems can significantly reduce the risk of exploitation.