CVE-2016-5986 in WebSphere Application Server
Summary
by MITRE
IBM WebSphere Application Server (WAS) 7.x before 7.0.0.43, 8.0.x before 8.0.0.13, 8.5.x before 8.5.5.11, 9.0.x before 9.0.0.2, and Liberty before 16.0.0.3 mishandles responses, which allows remote attackers to obtain sensitive information via unspecified vectors.
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Analysis
by VulDB Data Team • 09/26/2024
IBM WebSphere Application Server versions prior to specific patches contain a vulnerability that stems from improper handling of server responses, creating potential information disclosure risks for remote attackers. This flaw exists across multiple major versions including 7.x, 8.x, 9.x, and the Liberty profile, indicating a widespread issue within the application server's response processing mechanisms. The vulnerability classification aligns with CWE-200, which addresses information exposure through improper error handling and response management. The affected versions demonstrate a critical weakness in how the application server processes and responds to various client requests, potentially exposing sensitive system information that could aid in further exploitation attempts.
The technical implementation of this vulnerability involves the server's failure to properly sanitize or validate response data before returning it to clients. Attackers can exploit this weakness by crafting specific requests that trigger the server to return unintended information, potentially including system details, configuration data, or internal processing information. This type of vulnerability falls under the ATT&CK technique T1211 - Exploitation for Defense Evasion, where attackers leverage information disclosure to better understand target systems and plan subsequent attacks. The improper response handling could manifest through various mechanisms such as verbose error messages, stack traces, or system metadata that should not be exposed to external entities.
The operational impact of CVE-2016-5986 extends beyond simple information disclosure, as the leaked information could provide attackers with critical insights into the application server's internal architecture and configuration. This exposure creates opportunities for more sophisticated attacks including privilege escalation, service disruption, or exploitation of other vulnerabilities within the same environment. Organizations running affected WebSphere versions face significant risk, particularly in production environments where sensitive data processing occurs. The vulnerability affects both traditional WebSphere installations and the Liberty profile, demonstrating the breadth of the issue across different deployment models. Security teams must consider the potential for cascading effects where this information disclosure serves as a stepping stone for more advanced attacks.
Mitigation strategies for this vulnerability require immediate patching of affected IBM WebSphere Application Server versions to the recommended fixed releases. Organizations should prioritize updating their systems to versions 7.0.0.43, 8.0.0.13, 8.5.5.11, 9.0.0.2, and Liberty 16.0.0.3 or later. Additionally, implementing network-level controls such as firewalls and intrusion detection systems can help limit exposure by restricting access to the application server. Security monitoring should focus on unusual request patterns or response anomalies that might indicate exploitation attempts. The vulnerability's nature suggests that configuration hardening measures including disabling verbose error messages and implementing proper response filtering could provide additional protection layers. Organizations should also conduct thorough security assessments to identify any potential compromise from prior exploitation attempts. This vulnerability represents a classic example of how seemingly minor response handling flaws can create significant security risks when combined with other attack vectors in enterprise environments.