CVE-2020-4270 in QRadar
Summary
by MITRE
IBM QRadar 7.3.0 to 7.3.3 Patch 2 could allow a local user to gain escalated privileges due to weak file permissions. IBM X-ForceID: 175846.
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Analysis
by VulDB Data Team • 06/13/2024
IBM QRadar versions 7.3.0 through 7.3.3 Patch 2 contain a local privilege escalation vulnerability resulting from insufficient file permission controls. This weakness allows a local attacker to potentially elevate their privileges within the system. The vulnerability stems from the improper configuration of file and directory permissions that should restrict access to sensitive system components. When a local user can manipulate or access files with elevated permissions through these weak controls, they gain unauthorized access to system resources that should remain restricted to administrators or system processes. This flaw directly violates the principle of least privilege and represents a critical security oversight in the system's access control mechanisms.
The technical implementation of this vulnerability involves specific file permissions that are set to overly permissive values, allowing non-privileged users to read, write, or execute files that should only be accessible to system administrators or specific service accounts. The affected system components typically include configuration files, binary executables, or system libraries that contain sensitive information or functionality capable of affecting system integrity. Attackers can exploit this weakness by identifying files with incorrect permissions and leveraging them to execute privileged operations or modify system configurations. This type of vulnerability is classified under CWE-732 as Incorrect Permission Assignment for Critical Resources, which specifically addresses the scenario where critical system resources are granted insufficient access controls.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with potential access to sensitive data, system configuration information, and the ability to modify or corrupt system components. An attacker with local access can potentially gain administrative privileges, allowing them to manipulate logs, alter security policies, or even install malicious software. This vulnerability affects the overall security posture of the QRadar system, potentially enabling further attacks such as lateral movement within the network or persistence mechanisms. The risk is particularly elevated in environments where local access is not strictly controlled, as the vulnerability can be exploited by users with minimal privileges who have gained access to the system through other means.
Organizations should implement immediate mitigations including reviewing and correcting file permissions across all QRadar system components, particularly those related to system configuration and administrative functions. The recommended approach involves setting appropriate access controls using standard security practices such as the principle of least privilege and mandatory access controls. System administrators should conduct comprehensive audits of file permissions and ensure that only authorized users or system processes have access to sensitive files. Additionally, implementing regular security assessments and penetration testing can help identify similar permission-related vulnerabilities. The fix should align with industry standards such as those outlined in the NIST Cybersecurity Framework and ISO 27001 security controls for access management and privilege control. Organizations should also consider implementing monitoring solutions to detect unauthorized access attempts or changes to critical system files, as this vulnerability could potentially be used as a foothold for more extensive attacks within the network infrastructure.