CVE-2020-4510 in QRadar SIEM
Summary
by MITRE
IBM QRadar SIEM 7.3 and 7.4 is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. IBM X-Force ID: 182365.
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Analysis
by VulDB Data Team • 10/30/2020
The vulnerability identified as CVE-2020-4510 affects IBM QRadar Security Information and Event Management (SIEM) versions 7.3 and 7.4, representing a critical XML External Entity Injection (XXE) flaw that poses significant security risks to enterprise environments. This vulnerability resides within the XML processing mechanisms of the QRadar platform, specifically when handling incoming XML data from various sources including logs, alerts, and integration points. The XXE vulnerability stems from the application's insufficient validation of external entities during XML parsing operations, creating an attack surface where malicious actors can manipulate XML input to access internal system resources or trigger resource exhaustion.
The technical exploitation of this XXE vulnerability allows remote attackers to leverage malformed XML payloads that reference external entities, potentially enabling them to read local files, perform server-side request forgery attacks, or consume excessive memory resources through billion laughs attacks. This flaw directly maps to CWE-611, which categorizes insecure XML processing as a weakness that permits attackers to manipulate XML parsers into accessing unintended resources or executing unauthorized operations. The vulnerability's impact extends beyond simple information disclosure as it can be leveraged to perform denial of service attacks by consuming system resources, potentially leading to system instability or complete service disruption within the QRadar environment.
From an operational standpoint, this vulnerability presents a severe risk to organizations relying on QRadar for security monitoring and incident response, as it could enable attackers to extract sensitive data from the SIEM system including configuration files, user credentials, or other confidential information stored within the platform. The remote attack vector eliminates the need for physical access or network proximity, making this vulnerability particularly dangerous in enterprise environments where QRadar systems are often exposed to external networks. The attack could potentially be used to establish persistence within the environment or to pivot to other systems within the network infrastructure, as demonstrated by ATT&CK technique T1078.004 which covers valid accounts and T1566.001 for credential harvesting through spearphishing.
Organizations should prioritize immediate mitigation efforts including applying the vendor-provided security patches and updates, implementing network segmentation to limit access to QRadar systems, and configuring XML parsing restrictions to disable external entity processing. Additional protective measures include monitoring for suspicious XML traffic patterns, implementing web application firewalls to detect and block malicious XXE payloads, and conducting thorough vulnerability assessments to identify other potential XXE vulnerabilities within the broader IT infrastructure. The remediation process should also include disabling unnecessary XML processing capabilities and implementing strict input validation controls to prevent similar vulnerabilities from manifesting in other applications or services that may be susceptible to the same class of attack.