CVE-2021-29755 in QRadar SIEM
Summary
by MITRE • 07/20/2022
IBM QRadar SIEM 7.3, 7.4, and 7.5 does not preform proper certificate validation for some inter-host communications. IBM X-Force ID: 202015.
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Analysis
by VulDB Data Team • 08/15/2022
IBM QRadar SIEM versions 7.3, 7.4, and 7.5 contain a critical certificate validation vulnerability that undermines the security of inter-host communications within the system. This weakness stems from insufficient validation of SSL/TLS certificates used during internal communications between QRadar components, creating potential attack vectors for malicious actors seeking to compromise the security posture of the SIEM environment. The vulnerability specifically affects the certificate validation mechanisms that should ensure secure communication channels between different host components of the QRadar platform, potentially allowing unauthorized parties to intercept or manipulate data flowing between these systems.
The technical flaw manifests in the improper handling of certificate validation processes that should enforce strict verification of digital certificates used for establishing secure connections. This issue falls under the broader category of weak cryptographic practices and inadequate certificate validation as identified by CWE-295, which addresses the failure to validate certificates properly. The vulnerability enables man-in-the-middle attacks where adversaries can potentially present forged certificates to establish fraudulent connections with QRadar components, undermining the integrity and confidentiality of security data flows. The specific nature of the flaw suggests that the system may accept certificates without proper validation of their authenticity, issuer, or trust chain.
The operational impact of this vulnerability extends beyond simple data interception, as it creates opportunities for attackers to manipulate security events and logs within the QRadar environment. This compromise can lead to data corruption, unauthorized access to security information, and potential blind spots in security monitoring capabilities. Attackers leveraging this vulnerability could potentially modify security alerts, suppress threat detections, or inject false positive events that would interfere with incident response operations. The weakness particularly affects the integrity of internal communications, which are critical for maintaining the consistency and reliability of security analytics and correlation processes within the SIEM system. This vulnerability aligns with ATT&CK technique T1566.001, which covers the use of phishing with a malicious attachment, as attackers could exploit this weakness to establish persistent access through compromised internal communications.
Organizations utilizing affected QRadar versions should immediately implement mitigations including updating to patched versions of the software, implementing additional network segmentation measures, and strengthening certificate management policies. The recommended remediation involves applying the official IBM security patches that address the certificate validation weakness, while also considering enhanced monitoring of internal network communications for suspicious certificate usage patterns. Additional protective measures include implementing certificate pinning mechanisms, establishing stricter certificate validation policies, and conducting thorough security assessments of internal communication channels. Organizations should also review their incident response procedures to ensure they can detect and respond to potential exploitation of this vulnerability through internal network reconnaissance or certificate-based attacks. The vulnerability demonstrates the importance of maintaining robust certificate validation processes even within internal network environments where trust assumptions are typically higher.