CVE-2016-5535 in WebLogic Server
Summary
by MITRE
Unspecified vulnerability in the Oracle WebLogic Server component in Oracle Fusion Middleware 10.3.6.0, 12.1.3.0, 12.2.1.0, and 12.2.1.1 allows remote attackers to affect confidentiality, integrity, and availability via unknown vectors.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 09/26/2022
The vulnerability identified as CVE-2016-5535 represents a critical security flaw within Oracle WebLogic Server, a widely deployed enterprise Java application server that serves as a cornerstone for many organizations' mission-critical applications. This vulnerability resides within the Oracle Fusion Middleware suite, specifically affecting versions 10.3.6.0, 12.1.3.0, 12.2.1.0, and 12.2.1.1 of the WebLogic Server component. The unspecified nature of the vulnerability vectors indicates that attackers can potentially exploit multiple attack surfaces without specific disclosure of the precise technical mechanisms, making the threat particularly concerning for security professionals who must defend against unknown attack patterns.
The technical flaw manifests as a weakness that enables remote attackers to compromise the confidentiality, integrity, and availability of affected systems, representing a severe three-pronged attack surface that aligns with the core principles of the CIA triad. This vulnerability allows adversaries to potentially access sensitive data, modify system configurations, and disrupt service availability, effectively providing attackers with comprehensive control over the compromised WebLogic Server instances. The distributed nature of WebLogic Server deployments across enterprise networks means that exploitation of this vulnerability could result in widespread impact across multiple organizational systems and applications that depend on the affected middleware infrastructure.
The operational impact of CVE-2016-5535 extends far beyond simple system compromise, as WebLogic Server typically hosts critical enterprise applications including ERP systems, customer relationship management platforms, and financial applications that process sensitive business data. Organizations utilizing these vulnerable versions face significant risk of data breaches, service disruptions, and potential regulatory compliance violations that could result in substantial financial penalties and reputational damage. The remote exploitation capability means that attackers do not require physical access to the network or systems, enabling them to conduct attacks from anywhere on the internet, which significantly increases the attack surface and reduces the effectiveness of traditional network perimeter defenses.
Security professionals should note that this vulnerability aligns with several ATT&CK framework techniques including T1190 (Exploit Public-Facing Application) and T1046 (Network Service Scanning), as attackers would likely first identify vulnerable WebLogic instances through network scanning before attempting exploitation. The vulnerability also corresponds to CWE-1004, which describes security weaknesses that are "sufficiently general to appear in CWE as a class, but are not specific enough to appear as an entry by itself." Organizations must implement comprehensive patch management processes, network segmentation strategies, and continuous monitoring solutions to detect potential exploitation attempts. The remediation approach requires immediate application of Oracle's security patches and updates, along with network-level controls such as firewall rules and intrusion detection systems to limit exposure while patches are deployed. Additionally, organizations should conduct thorough vulnerability assessments of their WebLogic Server deployments to identify and remediate similar vulnerabilities that may exist within their broader technology infrastructure.