CVE-2019-4013 in BigFix Platform
Summary
by MITRE
IBM BigFix Platform 9.5 could allow any authenticated user to upload any file to any location on the server with root privileges. This results in code execution on underlying system with root privileges. IBM X-Force ID: 155887.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 12/01/2024
The vulnerability identified as CVE-2019-4013 affects the IBM BigFix Platform version 9.5, representing a critical authorization flaw that undermines the security posture of enterprise endpoint management systems. This vulnerability resides within the platform's file upload functionality, where proper access controls have been bypassed, allowing authenticated users to exploit a path traversal mechanism. The flaw enables attackers to upload malicious files to arbitrary locations on the server filesystem, effectively compromising the entire underlying infrastructure. The vulnerability's severity is amplified by the fact that uploads occur with root privileges, meaning that any authenticated user can potentially escalate their privileges to system administrator level.
The technical exploitation of this vulnerability involves leveraging the platform's file handling mechanisms to bypass directory restrictions and upload files to privileged locations such as system directories or executable paths. This type of vulnerability aligns with CWE-22, which describes path traversal flaws that allow attackers to access files and directories outside the intended scope. The vulnerability's root cause stems from inadequate input validation and insufficient access control checks during file upload operations. Attackers can craft malicious upload requests that include directory traversal sequences such as ../ or ..\ to navigate to restricted directories, then upload payloads that execute with elevated privileges.
The operational impact of CVE-2019-4013 is profound for organizations relying on IBM BigFix for endpoint management and security operations. Once exploited, the vulnerability provides attackers with complete system compromise capabilities, enabling them to execute arbitrary code with root privileges, install backdoors, modify system configurations, or exfiltrate sensitive data from the entire network. This vulnerability directly impacts the integrity and confidentiality of enterprise security infrastructure, as the BigFix platform typically serves as a critical component for managing security policies, deploying patches, and monitoring endpoint compliance. The attack surface extends beyond immediate system compromise to include potential lateral movement within the network, as compromised BigFix servers often serve as central points for managing multiple endpoints.
Organizations should implement immediate mitigations including patching the affected IBM BigFix Platform to version 9.5.13 or later, which addresses the file upload vulnerability through proper input validation and access control enforcement. Network segmentation and monitoring should be enhanced to detect anomalous file upload activities, while privileged access controls must be strictly enforced through principle of least privilege. The vulnerability demonstrates the importance of implementing secure file handling practices and proper authorization checks, as outlined in the OWASP Top 10 2017 category A04:2017. Additionally, organizations should consider implementing web application firewalls and intrusion detection systems to monitor for exploitation attempts, as this type of vulnerability frequently appears in ATT&CK matrix under T1059.001 for command and scripting interpreter and T1078.004 for valid accounts, highlighting the need for comprehensive monitoring and access control measures. The vulnerability also underscores the critical importance of regular security assessments and penetration testing of enterprise security platforms to identify and remediate similar authorization flaws before they can be exploited by adversaries.