CVE-2018-1767 in WebSphere Application Server
Summary
by MITRE
IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 Cachemonitor is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 148621.
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Analysis
by VulDB Data Team • 06/03/2023
The vulnerability identified as CVE-2018-1767 affects IBM WebSphere Application Server versions 7.0, 8.0, 8.5, and 9.0, specifically within the Cachemonitor component. This cross-site scripting vulnerability represents a critical security weakness that undermines the integrity of the web-based administrative interface. The flaw allows malicious actors to inject arbitrary JavaScript code into the web user interface, thereby compromising the application's intended behavior and potentially enabling unauthorized access to sensitive session data.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding within the Cachemonitor functionality. When users interact with the monitoring interface, improperly sanitized user-supplied data is directly rendered back to the browser without adequate sanitization measures. This creates an environment where attackers can craft malicious payloads that execute within the context of authenticated sessions, leveraging the trust relationship between the user and the application server. The vulnerability specifically targets the web-based management console, making it particularly dangerous as it operates within the privileged context of administrative users.
From an operational impact perspective, this vulnerability exposes organizations to significant risks including credential theft, session hijacking, and potential lateral movement within the network infrastructure. Attackers who successfully exploit this vulnerability can access administrative sessions and potentially escalate their privileges to gain full control over the WebSphere application server. The threat is compounded by the fact that the vulnerability exists within a monitoring component that is typically accessible to administrators, providing attackers with a direct path to execute malicious code within the application server environment. This aligns with ATT&CK technique T1059.007 for JavaScript execution and T1566 for credential access through web application vulnerabilities.
Organizations should implement immediate mitigations including applying the vendor-provided security patches and updates for affected IBM WebSphere versions. Network segmentation and access controls should be strengthened to limit exposure of the administrative interfaces. Input validation should be enhanced throughout the application server components, particularly focusing on user-supplied data that flows into web UI elements. The implementation of Content Security Policy headers and proper output encoding can provide additional protection layers against XSS attacks. This vulnerability demonstrates the importance of maintaining up-to-date security practices and following security guidelines such as those outlined in CWE-79 for cross-site scripting vulnerabilities. Organizations should also consider implementing web application firewalls and continuous monitoring solutions to detect and prevent exploitation attempts. The IBM Security Bulletin for this vulnerability provides specific guidance on patch installation and configuration changes required to remediate the issue effectively.
The broader implications of this vulnerability highlight the critical need for comprehensive security testing of administrative interfaces and monitoring components within enterprise application servers. Regular security assessments and vulnerability scanning should include thorough testing of web-based management interfaces to identify similar injection vulnerabilities. This case underscores the importance of following secure coding practices and implementing defense-in-depth strategies to protect critical infrastructure components that handle privileged operations and sensitive data access.