CVE-2005-0261 in AIX
Summary
by MITRE
lspath in aix 5.2 5.3 and possibly earlier versions does not drop privileges before processing the -f option which allows local users to read one line of arbitrary files.
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Analysis
by VulDB Data Team • 01/14/2018
The vulnerability identified as CVE-2005-0261 affects the lspath utility in IBM AIX operating systems version 5.2, 5.3, and potentially earlier releases. This issue represents a privilege escalation flaw that occurs when the utility processes the -f command line option. The lspath utility is designed to list paths for logical volumes and is commonly used for system administration tasks within the AIX environment. The vulnerability stems from improper privilege handling during the processing of specific command line arguments, creating a security risk that can be exploited by local attackers.
The technical flaw manifests in the lspath utility's failure to properly drop elevated privileges before executing file processing operations when the -f option is specified. This behavior creates a condition where a local user can manipulate the utility to read one line from arbitrary files on the system. The vulnerability is classified under CWE-276 as improper privilege management, specifically involving inadequate privilege dropping mechanisms. When the -f option is used, the utility continues to operate with elevated privileges, allowing it to access files that would normally be restricted to authorized users only. The impact is limited to reading only one line from any specified file, but this single line access can still provide valuable information to an attacker about system configuration, file contents, or sensitive data.
The operational impact of this vulnerability extends beyond simple information disclosure, as it represents a fundamental flaw in privilege management within a system administration tool. Local users who can execute lspath with elevated privileges can leverage this vulnerability to extract sensitive information from system files, configuration files, or other data repositories. This type of vulnerability aligns with ATT&CK technique T1005 as it involves data from local system repositories, and T1068 which covers privilege escalation through improper privilege management. The vulnerability is particularly concerning in multi-user environments where local access might be granted to less trusted users, as it allows for covert reconnaissance activities that could lead to more significant compromises.
Mitigation strategies for CVE-2005-0261 should focus on immediate patching of affected AIX systems to the latest security updates from IBM. System administrators should ensure that all AIX systems running versions 5.2, 5.3, or earlier are updated with the appropriate security fixes. Additionally, organizations should implement strict access controls to limit local user privileges and monitor for unauthorized execution of system administration utilities. The principle of least privilege should be enforced, ensuring that users only have access to the minimum necessary permissions for their roles. Regular security audits should be conducted to identify and remediate similar privilege management issues in other system utilities. Organizations should also consider implementing monitoring solutions that can detect suspicious usage patterns of system administration tools, particularly when they are used with command line options that might trigger privilege escalation conditions.