CVE-2019-4264 in QRadar SIEM
Summary
by MITRE
IBM QRadar SIEM 7.2.8 WinCollect could allow an attacker to obtain sensitive information by spoofing a trusted entity using man in the middle techniques due to not validating or incorrectly validating a certificate. IBM X-Force ID: 160072.
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Analysis
by VulDB Data Team • 09/25/2023
The vulnerability identified as CVE-2019-4264 affects IBM QRadar SIEM version 7.2.8 WinCollect component, representing a critical security flaw that enables attackers to compromise sensitive information through sophisticated man-in-the-middle attacks. This weakness stems from inadequate certificate validation mechanisms within the WinCollect module, which is responsible for collecting and forwarding security events from Windows systems to the QRadar platform. The vulnerability specifically targets the certificate validation process that should ensure the authenticity of communication endpoints, but fails to properly verify digital certificates presented during network communications.
The technical flaw manifests when the WinCollect agent establishes connections with Windows systems or other network entities, where it accepts certificates without proper validation or incorrectly processes certificate chains. This improper certificate validation creates an attack surface where malicious actors can impersonate legitimate systems by presenting forged certificates that appear valid to the vulnerable WinCollect component. The attack vector leverages standard man-in-the-middle techniques where attackers position themselves between the WinCollect agent and target systems, intercepting and modifying communications while maintaining the appearance of legitimate network traffic. This vulnerability directly maps to CWE-295 which addresses improper certificate validation and CWE-310 which covers cryptographic issues related to certificate handling.
The operational impact of this vulnerability extends beyond simple information disclosure, as it fundamentally undermines the integrity and trust model of the QRadar SIEM environment. Attackers exploiting this weakness can gain unauthorized access to sensitive security event data, potentially including network logs, system events, and security alerts that are critical for threat detection and incident response. The compromised WinCollect agents may also enable attackers to manipulate or redirect security data flows, creating blind spots in the organization's security monitoring capabilities while simultaneously providing attackers with elevated privileges within the SIEM infrastructure. This vulnerability particularly affects organizations relying on QRadar for compliance monitoring and security operations, as it could allow attackers to evade detection mechanisms and access confidential information that should remain protected within the security operations center.
Organizations should implement immediate mitigations including updating to patched versions of IBM QRadar SIEM, configuring proper certificate validation policies, and implementing network monitoring to detect potential man-in-the-middle activities. The vulnerability aligns with several ATT&CK techniques including T1046 for network service scanning and T1566 for credential harvesting through social engineering, though the specific attack pattern leverages network protocol manipulation rather than traditional social engineering approaches. Security teams should also consider implementing additional network segmentation controls and certificate pinning mechanisms to prevent exploitation of this vulnerability while waiting for official patches. The incident response implications are significant, as organizations may need to conduct comprehensive security assessments of their QRadar environments and potentially revoke and reissue certificates throughout their infrastructure to ensure complete remediation of this vulnerability.