CVE-2014-0899 in AIX
Summary
by MITRE
ftpd in IBM AIX 7.1.1 before SP10 and 7.1.2 before SP5, when a Workload Partition (aka WPAR) for AIX 5.2 or 5.3 is used, allows remote authenticated users to bypass intended permission settings and modify arbitrary files via FTP commands.
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Analysis
by VulDB Data Team • 05/07/2026
The vulnerability identified as CVE-2014-0899 represents a critical access control flaw in the ftpd service component of IBM AIX operating systems. This issue specifically affects IBM AIX versions 7.1.1 prior to Service Pack 10 and 7.1.2 prior to Service Pack 5, with additional impact on systems utilizing Workload Partition (WPAR) environments for AIX 5.2 or 5.3. The flaw exists within the FTP daemon implementation that governs file access permissions when operating within virtualized partition environments. This vulnerability falls under the CWE-284 category, which encompasses improper access control vulnerabilities, and aligns with ATT&CK technique T1078 for valid accounts and T1566 for credential access through network protocols. The security implications extend beyond standard file system protections, particularly when WPAR environments are involved, as these partitions create isolated execution contexts that should maintain strict separation of privileges and access controls.
The technical mechanism behind this vulnerability stems from improper validation of file access permissions within the ftpd service when operating in WPAR environments. When authenticated users establish FTP connections to systems running affected AIX versions, the service fails to properly enforce the intended access controls that should prevent users from modifying files outside their designated permissions. This occurs specifically within the context of WPAR partitions where the underlying operating system should maintain strict boundary controls between different virtualized environments. The flaw allows attackers to craft specific FTP commands that bypass the normal file system permission checking mechanisms, enabling them to traverse directory structures and modify files that should otherwise be restricted. This represents a privilege escalation vulnerability that can be exploited by authenticated users who may not possess the necessary permissions to access or modify certain files within the system.
The operational impact of this vulnerability is significant for organizations utilizing IBM AIX systems in production environments, particularly those implementing WPAR virtualization for workload management. Attackers who successfully exploit this vulnerability can gain unauthorized access to sensitive system files, configuration data, and user information stored on the affected systems. The ability to modify arbitrary files within the system creates opportunities for persistent compromise, data exfiltration, system corruption, and potential lateral movement within the network. Organizations using WPAR environments are especially vulnerable as the virtualization layer introduces additional complexity in access control enforcement, making it more likely that permission boundaries can be crossed. This vulnerability can be particularly dangerous in enterprise environments where AIX systems often host critical business applications and sensitive data, as it allows for unauthorized modification of system components that could lead to complete system compromise. The impact extends to compliance requirements, as unauthorized file modifications can violate data integrity standards and regulatory compliance frameworks.
Mitigation strategies for CVE-2014-0899 should focus on immediate patch application for the affected IBM AIX versions, specifically applying the relevant service packs that address the access control implementation flaws. Organizations should implement network segmentation to limit access to FTP services, particularly when running within WPAR environments, and consider disabling FTP services where possible in favor of more secure file transfer protocols such as SFTP or SCP. Access controls should be reviewed and strengthened to ensure that even authenticated users cannot modify files outside their designated permissions, with particular attention to WPAR environment configurations. System administrators should monitor FTP access logs for suspicious activity and implement intrusion detection systems to identify potential exploitation attempts. The vulnerability demonstrates the importance of maintaining current system patches, particularly in virtualized environments where additional complexity can introduce new attack vectors. Organizations should also consider implementing principle of least privilege configurations for FTP users and regularly audit file access permissions to identify any unauthorized modifications that may have occurred as a result of this vulnerability.