CVE-2014-8904 in AIX
Summary
by MITRE
lquerylv in cmdlvm in IBM AIX 5.3, 6.1, and 7.1 and VIOS 2.2.x allows local users to gain privileges via a crafted DBGCMD_LQUERYLV environment-variable value.
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Analysis
by VulDB Data Team • 12/08/2024
The vulnerability identified as CVE-2014-8904 represents a privilege escalation flaw within IBM AIX operating systems and Virtual I/O Server environments. This issue affects multiple versions including AIX 5.3, 6.1, and 7.1, as well as VIOS 2.2.x, making it a significant concern for enterprise systems that rely on these platforms. The vulnerability specifically resides in the lquerylv component of the cmdlvm utility, which is responsible for querying logical volume information within the AIX volume management framework.
The technical flaw manifests through improper input validation of the DBGCMD_LQUERYLV environment variable. When a local attacker crafts a malicious value for this environment variable, the system fails to adequately sanitize the input before processing it within the lquerylv functionality. This insufficient validation creates a path for privilege escalation where unprivileged local users can potentially elevate their system privileges to root level access. The vulnerability operates at the system level where the cmdlvm utility executes with elevated privileges, allowing the crafted environment variable to be interpreted as a command injection vector.
The operational impact of this vulnerability extends beyond simple privilege escalation as it provides attackers with unauthorized access to critical system resources and functions. Local users who exploit this vulnerability can gain root privileges without requiring legitimate administrative credentials, making detection particularly challenging since the attack appears to originate from a legitimate system process. The implications are severe for AIX environments where multiple users may have local access, as any compromised user account could potentially lead to complete system takeover. This vulnerability directly maps to CWE-78 and CWE-20 categories, representing command injection and input validation flaws respectively, and aligns with ATT&CK technique T1068 which covers "Exploitation for Privilege Escalation."
Mitigation strategies for CVE-2014-8904 require immediate attention from system administrators and security teams managing affected IBM AIX systems. The most effective approach involves applying the appropriate IBM security patches and updates that address the input validation issues within the cmdlvm utility. Organizations should also implement strict environment variable controls and monitoring for suspicious DBGCMD_LQUERYLV usage patterns. Additional defensive measures include restricting local user access to system utilities where possible, implementing privilege separation techniques, and conducting regular security audits of environment variable configurations. System administrators should also consider implementing intrusion detection systems that can identify unusual patterns of environment variable manipulation and privilege escalation attempts. The vulnerability demonstrates the critical importance of input validation in system utilities that execute with elevated privileges, as even minor oversights in sanitization can lead to complete system compromise.