CVE-2005-4068 in AIX
Summary
by MITRE
unspecified "absolute path vulnerability" in umountall in ibm aix 5.1 through 5.3 allows local users to cause unknown impact via unknown vectors.
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Analysis
by VulDB Data Team • 07/06/2021
The vulnerability identified as CVE-2005-4068 represents a critical absolute path vulnerability within the umountall utility distributed with IBM AIX operating systems version 5.1 through 5.3. This flaw exists in the system's mount management functionality where the umountall command fails to properly validate file paths, creating an opportunity for local attackers to manipulate system resources through improper path resolution. The vulnerability classifies under CWE-22 as an improper limitation of a pathname to a restricted directory, commonly referred to as path traversal or directory traversal attacks. Such vulnerabilities are particularly dangerous because they can enable attackers to access files and directories outside of their intended scope, potentially leading to privilege escalation or information disclosure.
The technical implementation of this vulnerability stems from the umountall utility's failure to sanitize or validate absolute paths during filesystem unmount operations. When local users execute this command with maliciously crafted arguments, the system processes these paths without adequate input validation, allowing for potential exploitation through various attack vectors that remain unspecified in the original CVE description. The impact of such a vulnerability extends beyond simple privilege escalation as it can enable attackers to manipulate critical system resources, potentially leading to complete system compromise. This particular flaw is categorized under the ATT&CK framework as privilege escalation through exploitation of system utilities, specifically targeting the system binary execution and file system access categories.
The operational impact of CVE-2005-4068 in AIX environments poses significant risks to system integrity and security posture, particularly in multi-user systems where local users might attempt to leverage this weakness for unauthorized access. Attackers could potentially use this vulnerability to access sensitive system files, modify critical configuration data, or escalate privileges to gain root access. The vulnerability affects a wide range of IBM AIX systems within the 5.1 through 5.3 version spectrum, representing a substantial attack surface for malicious actors who possess local access to these systems. Organizations running these older AIX versions face elevated risk due to the lack of modern security controls and the absence of patches for this specific vulnerability.
Mitigation strategies for CVE-2005-4068 should focus on immediate system hardening measures including the implementation of proper input validation for all system utilities, the application of security patches provided by IBM, and the enforcement of least privilege principles for local user accounts. System administrators should conduct thorough audits of all system utilities to identify potential path traversal vulnerabilities and implement proper file access controls. The vulnerability highlights the importance of regular security updates and the need for comprehensive vulnerability management programs that can identify and remediate such issues before they can be exploited by attackers. Additionally, monitoring and logging of system utilities execution should be enhanced to detect potential exploitation attempts and provide forensic evidence for incident response activities.