CVE-2016-0671 in HTTP Server
Summary
by MITRE
Unspecified vulnerability in the Oracle HTTP Server component in Oracle Fusion Middleware 12.1.2.0 allows remote attackers to affect confidentiality via vectors related to OSSL Module.
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Analysis
by VulDB Data Team • 07/25/2022
The vulnerability identified as CVE-2016-0671 resides within the Oracle HTTP Server component of Oracle Fusion Middleware version 12.1.2.0, representing a significant security weakness that exposes systems to potential confidentiality breaches. This unspecified vulnerability specifically manifests through issues related to the OSSL Module, which serves as a critical cryptographic library integration within the web server infrastructure. The Oracle HTTP Server operates as a key component in enterprise web deployments, handling HTTP requests and responses while providing SSL/TLS capabilities through its integration with OpenSSL libraries. The OSSL Module acts as an interface between the Oracle HTTP Server and the underlying OpenSSL implementation, managing cryptographic operations and secure communications. This particular vulnerability demonstrates the inherent complexity of integrating third-party cryptographic libraries with enterprise web servers, where flaws in the integration layer can compromise the entire security posture of the system.
The technical flaw associated with CVE-2016-0671 stems from insufficient validation or handling within the OSSL Module's implementation, creating potential attack vectors that allow remote adversaries to exploit the system without requiring authentication or local access. The vulnerability's classification as affecting confidentiality indicates that attackers can potentially intercept, modify, or access sensitive data transmitted through the Oracle HTTP Server. This type of vulnerability typically arises from improper input validation, memory corruption issues, or flawed cryptographic implementation within the OpenSSL integration layer. The unspecified nature of the vulnerability description suggests that the exact technical mechanism may have been deliberately obscured, which is common in early vulnerability disclosures where full technical details are still being analyzed. Attackers leveraging this weakness could potentially perform man-in-the-middle attacks, decrypt sensitive communications, or gain unauthorized access to confidential data flowing through the affected web server.
The operational impact of CVE-2016-0671 extends beyond immediate confidentiality concerns to encompass broader enterprise security implications, particularly for organizations relying on Oracle Fusion Middleware for their web infrastructure. Systems utilizing the affected Oracle HTTP Server version become vulnerable to remote exploitation, potentially compromising sensitive business data, intellectual property, and customer information. The vulnerability affects organizations across various sectors including finance, healthcare, and government, where data confidentiality is paramount and regulatory compliance requirements are stringent. The remote attack vector eliminates the need for physical access or local network presence, making the vulnerability particularly dangerous in environments where network segmentation is not properly implemented. Organizations may experience significant operational disruption, including potential service outages, data breaches, and compliance violations that could result in substantial financial penalties and reputational damage.
Mitigation strategies for CVE-2016-0671 should prioritize immediate patching through Oracle's security updates, which would address the underlying OSSL Module implementation flaws. Organizations must also implement network segmentation and firewall rules to limit access to the affected Oracle HTTP Server instances, particularly in environments where the vulnerability cannot be immediately patched. Security monitoring should be enhanced to detect potential exploitation attempts, including unusual traffic patterns or authentication failures that may indicate successful attacks. The implementation of additional security controls such as intrusion detection systems, network monitoring tools, and regular security assessments can help identify and respond to potential exploitation attempts. Organizations should also consider implementing certificate pinning mechanisms and alternative cryptographic libraries where feasible, while ensuring that all systems are regularly updated with the latest security patches. This vulnerability highlights the importance of maintaining up-to-date cryptographic implementations and the necessity of comprehensive vulnerability management programs that address both known and emerging threats in enterprise web infrastructure. The issue aligns with CWE-200, which addresses information exposure, and represents a potential attack surface that could be exploited through techniques categorized under the ATT&CK framework's credential access and defense evasion tactics.