CVE-2018-1996 in WebSphere Application Server
Summary
by MITRE
IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 could provide weaker than expected security, caused by the improper TLS configuration. A remote attacker could exploit this vulnerability to obtain sensitive information using man in the middle techniques. IBM X-Force ID: 154650.
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Analysis
by VulDB Data Team • 07/11/2023
IBM WebSphere Application Server versions 7.0, 8.0, 8.5, and 9.0 contain a critical security flaw in their Transport Layer Security implementation that significantly weakens cryptographic protection for network communications. This vulnerability stems from improper TLS configuration parameters that fail to enforce strong encryption standards, creating an exploitable weakness in the server's security posture. The flaw allows remote attackers to perform man-in-the-middle attacks by intercepting and potentially decrypting sensitive data transmitted between clients and the application server.
The technical root cause of this vulnerability lies in the server's failure to properly configure TLS protocol versions and cipher suites, enabling the use of weak cryptographic algorithms that are susceptible to modern cryptanalysis techniques. When the application server accepts connections using outdated or insecure TLS configurations, it creates opportunities for attackers to downgrade encryption protocols or exploit known vulnerabilities in weaker cipher suites. This misconfiguration essentially provides an attacker with a pathway to establish connections using reduced security parameters that do not meet contemporary cryptographic standards.
The operational impact of this vulnerability extends beyond simple information disclosure, as it fundamentally undermines the confidentiality and integrity of data transmitted through the WebSphere application server. Attackers can leverage this weakness to intercept sensitive information including user credentials, personal data, financial transactions, and proprietary business information that flows through the application server. The man-in-the-middle attack vector allows adversaries to not only eavesdrop on communications but potentially modify data in transit, leading to data corruption and unauthorized access to protected resources. This vulnerability affects organizations that rely on WebSphere for critical business applications, potentially exposing them to significant regulatory and compliance violations.
Organizations should immediately implement mitigations including enforcing strong TLS protocol versions such as TLS 1.2 or higher, disabling support for weak cipher suites, and configuring the application server to reject insecure protocol versions. The vulnerability aligns with CWE-319 (CWE-319: Cleartext Transmission of Sensitive Information) and represents a critical failure in secure communication implementation. Security teams should also consider implementing additional network monitoring to detect potential exploitation attempts and ensure that all client-server communications are properly encrypted using industry-standard cryptographic protocols. The ATT&CK framework categorizes this vulnerability under T1046 (Network Service Scanning) and T1566 (Phishing) as attackers may use this weakness to establish persistent access through compromised communication channels.