CVE-2005-2236 in AIX
Summary
by MITRE
Format string vulnerability in the paginit command in IBM AIX 5.3, and possibly other versions, might allow local users to execute arbitrary code via format strings in command line arguments.
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Analysis
by VulDB Data Team • 06/05/2024
The vulnerability identified as CVE-2005-2236 represents a critical format string flaw within the paginit command of IBM AIX 5.3 operating system. This issue stems from improper input validation and handling of command line arguments that are processed through format string functions without adequate sanitization. The vulnerability exists in the way the paginit utility processes user-supplied parameters, creating an opportunity for malicious input to be interpreted as executable code rather than simple data. Such flaws typically occur when developer code uses functions like printf or sprintf without proper validation of input arguments, allowing attackers to manipulate the format string interpretation.
The technical exploitation of this vulnerability enables local users to gain elevated privileges and execute arbitrary code on the affected system. When the paginit command processes command line arguments containing format specifiers, these can be manipulated to read from memory locations or write data to specific addresses. This type of vulnerability falls under the CWE-134 classification, which specifically addresses format string vulnerabilities where untrusted data is used as format string parameters. The attack vector requires local system access, making it a privilege escalation vulnerability that can be particularly dangerous in multi-user environments where local users might not have administrative rights but could leverage this flaw to gain higher privileges.
From an operational perspective, this vulnerability poses significant risks to IBM AIX 5.3 systems and potentially other affected versions, as it allows for arbitrary code execution with the privileges of the user running the paginit command. The impact extends beyond simple local privilege escalation, as successful exploitation could lead to complete system compromise and unauthorized access to sensitive data. The vulnerability affects the core system utilities and could be leveraged to establish persistent access or to escalate privileges to root level, depending on the execution context and system configuration. Organizations running IBM AIX 5.3 systems are particularly vulnerable as this flaw exists in the fundamental system command processing mechanisms.
Security mitigations for CVE-2005-2236 should focus on immediate patching of affected IBM AIX systems with the vendor-provided security updates. System administrators should also implement input validation measures to prevent format string exploitation in similar system utilities. The vulnerability aligns with ATT&CK technique T1068 which covers local privilege escalation through system binary manipulation. Additional protective measures include restricting local user access to system commands, implementing proper access controls, and monitoring for suspicious command execution patterns. Organizations should also consider implementing security awareness training for system administrators to recognize potential exploitation attempts and maintain up-to-date vulnerability assessments to identify similar weaknesses in other system components.