CVE-2016-2872 in Security QRadar SIEM
Summary
by MITRE
Directory traversal vulnerability in IBM Security QRadar SIEM 7.2.x before 7.2.7 and QRadar Incident Forensics 7.2.x before 7.2.7 allows remote attackers to read arbitrary files via a crafted URL.
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Analysis
by VulDB Data Team • 02/15/2019
The vulnerability identified as CVE-2016-2872 represents a critical directory traversal flaw affecting IBM Security QRadar SIEM 7.2.x versions prior to 7.2.7 and QRadar Incident Forensics 7.2.x versions before 7.2.7. This vulnerability resides in the web application layer of these security information and event management systems, specifically within the URL handling mechanisms that process user-supplied input without adequate validation or sanitization. The flaw enables remote attackers to manipulate file path references through crafted URLs, potentially gaining unauthorized access to sensitive system files and data that should remain protected within the application's secure boundaries.
The technical implementation of this directory traversal vulnerability stems from insufficient input validation within the QRadar web interface components. When processing user requests containing specially crafted URLs, the system fails to properly sanitize or validate the file path parameters, allowing attackers to use sequences such as ../ or ..\ to navigate outside the intended directory structure. This weakness directly maps to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The vulnerability exploits the fundamental assumption that user input will be properly formatted and safe, failing to implement proper input sanitization or path validation mechanisms that would prevent such malicious path manipulation.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it can enable attackers to extract sensitive configuration files, system logs, credential stores, and other critical system data that could compromise the entire security infrastructure. Attackers could potentially access database files, application configuration settings, encryption keys, and other confidential information stored within the QRadar environment. This represents a significant threat to organizations relying on QRadar for security monitoring and incident response, as the exposure of such information could lead to further exploitation, including privilege escalation, data exfiltration, or complete system compromise. The remote nature of this attack vector means that adversaries can exploit the vulnerability from external networks without requiring physical access or prior authentication within the system.
Organizations affected by CVE-2016-2872 should immediately implement mitigations including applying the official IBM Security patches released for QRadar SIEM 7.2.7 and QRadar Incident Forensics 7.2.7, which address the directory traversal vulnerability through proper input validation and sanitization. Network segmentation and firewall rules should be implemented to restrict access to QRadar web interfaces, particularly limiting exposure to trusted networks only. Additionally, implementing web application firewalls and intrusion detection systems can help detect and block malicious URL patterns attempting to exploit this vulnerability. The remediation process should also include comprehensive security testing and validation to ensure that all patched components function correctly without introducing new vulnerabilities. Organizations should also consider implementing monitoring and alerting for unusual file access patterns and conduct regular security assessments to identify and address similar weaknesses in other components of their security infrastructure. This vulnerability demonstrates the importance of proper input validation and secure coding practices in security applications, as highlighted by ATT&CK technique T1059.007 for command and scripting interpreter, where improper input handling can lead to various attack vectors including path traversal and privilege escalation.