CVE-2020-4786 in QRadar SIEM
Summary
by MITRE • 01/28/2021
IBM QRadar SIEM 7.4.2 GA to 7.4.2 Patch 1, 7.4.0 to 7.4.1 Patch 1, and 7.3.0 to 7.3.3 Patch 5 is vulnerable to server side request forgery (SSRF). This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks. IBM X-Force ID: 189221.
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Analysis
by VulDB Data Team • 02/20/2021
The vulnerability identified as CVE-2020-4786 affects IBM QRadar SIEM versions ranging from 7.4.2 GA through 7.4.2 Patch 1, 7.4.0 to 7.4.1 Patch 1, and 7.3.0 to 7.3.3 Patch 5. This represents a critical server-side request forgery flaw that enables authenticated attackers to manipulate the application's behavior by sending unauthorized requests from the QRadar system itself. The vulnerability resides within the application's handling of user-supplied input that is subsequently used to construct HTTP requests to external systems. This issue falls under CWE-918, which specifically addresses server-side request forgery vulnerabilities where applications fail to properly validate or sanitize external resource references. The attack vector requires an authenticated user context, meaning that an adversary must first establish legitimate credentials to exploit this weakness, though the impact extends beyond simple credential compromise.
The technical implementation of this vulnerability allows an attacker to leverage the QRadar system's legitimate network communication capabilities to probe internal networks or access restricted resources that would normally be protected by network segmentation. When an authenticated user submits malicious input that gets processed and used in constructing outbound requests, the application can be coerced into making connections to arbitrary destinations. This enables network enumeration activities where attackers can discover internal services, ports, and systems that exist behind firewalls or network boundaries. The vulnerability essentially transforms the QRadar system into an unwitting proxy for network reconnaissance, potentially exposing sensitive internal infrastructure to external threat actors. From an operational perspective, this represents a significant escalation of risk since it allows attackers to bypass traditional network security controls and gain insights into the internal attack surface.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the foundation for more sophisticated attacks including privilege escalation, lateral movement, and data exfiltration. Network enumeration capabilities can reveal critical infrastructure components such as database servers, application servers, or administrative interfaces that may contain additional vulnerabilities. This weakness aligns with ATT&CK technique T1018, which covers 'Remote System Discovery,' where adversaries attempt to identify and map network infrastructure. The vulnerability's potential to facilitate other attacks makes it particularly dangerous in enterprise environments where QRadar serves as a central security monitoring platform. Organizations may experience cascading security issues if attackers use this capability to identify additional targets within their network infrastructure, potentially leading to full system compromise. The impact is especially severe for organizations that rely heavily on QRadar for security monitoring and incident response, as the vulnerability could be exploited to hide malicious activities from detection systems.
Mitigation strategies for CVE-2020-4786 should focus on immediate patching of affected QRadar versions to address the server-side request forgery vulnerability. Organizations must ensure that all systems running the vulnerable versions are updated with the appropriate security patches provided by IBM. Network segmentation and access controls should be reviewed to limit the scope of potential exploitation, particularly restricting the ability of authenticated users to perform network reconnaissance activities. Input validation and sanitization mechanisms should be strengthened to prevent malicious requests from being processed and executed by the application. Security monitoring should be enhanced to detect unusual outbound network requests that may indicate exploitation attempts. Additionally, organizations should implement network access controls that prevent the QRadar system from making unauthorized outbound connections to internal network segments. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities within the broader security infrastructure, as this type of weakness often indicates broader architectural issues that may affect other applications within the organization. The vulnerability serves as a reminder of the importance of proper input validation and the potential risks associated with applications that perform network operations on behalf of authenticated users.