CVE-2002-1468 in AIX
Summary
by MITRE
Buffer overflow in errpt in AIX 4.3.3 allows local users to execute arbitrary code as root.
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Analysis
by VulDB Data Team • 06/05/2024
The vulnerability identified as CVE-2002-1468 represents a critical buffer overflow flaw within the errpt utility of IBM AIX 4.3.3 operating systems. This specific vulnerability resides in the error reporting tool that is integral to the AIX system's diagnostic capabilities, making it a prime target for local privilege escalation attacks. The errpt command serves as a crucial component for retrieving system error logs and diagnostic information, which makes its exploitation particularly dangerous as it can be leveraged to gain elevated system privileges. The buffer overflow occurs when the utility processes error log entries that exceed predetermined memory boundaries, creating an opportunity for malicious code execution. This vulnerability directly impacts the integrity and confidentiality of the AIX 4.3.3 environment, as successful exploitation grants attackers root-level access to the system.
The technical implementation of this buffer overflow stems from inadequate input validation within the errpt utility's memory management routines. When processing malformed or excessively long error log entries, the application fails to properly bounds-check the data being read into fixed-size buffers, allowing attackers to overwrite adjacent memory locations. This memory corruption can be strategically manipulated to overwrite return addresses or function pointers, effectively redirecting program execution flow. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios. Attackers can exploit this flaw by crafting specially formatted error log entries that trigger the overflow during normal operation of the errpt command, potentially enabling arbitrary code execution with root privileges.
The operational impact of CVE-2002-1468 extends beyond simple privilege escalation, as it fundamentally compromises system security and stability. Local users who can execute the errpt command gain the ability to execute arbitrary code as the root user, which provides complete control over the affected system. This includes access to all system files, user accounts, network resources, and the ability to install malicious software or establish persistent backdoors. The vulnerability is particularly concerning because it requires minimal privileges to exploit, as the errpt command is typically accessible to local users. Additionally, the attack vector is relatively simple to implement, making it attractive to both casual attackers and more sophisticated threat actors. The compromised system becomes vulnerable to further attacks, as attackers can use the elevated privileges to establish persistent access, conduct reconnaissance, or move laterally within network environments.
Mitigation strategies for CVE-2002-1468 should prioritize immediate patch deployment from IBM, as this vulnerability was addressed through official security updates for AIX 4.3.3. Organizations should implement comprehensive system hardening measures, including restricting access to the errpt command and monitoring for suspicious usage patterns. The principle of least privilege should be enforced by ensuring that only authorized personnel have access to system diagnostic tools that could be exploited in this manner. System administrators should also consider implementing intrusion detection systems to monitor for exploitation attempts and maintain detailed audit logs of errpt command usage. Additional defensive measures include regular security assessments and vulnerability scanning to identify similar buffer overflow vulnerabilities in other system utilities. According to ATT&CK framework, this vulnerability maps to T1068, which covers Exploitation for Privilege Escalation, and T1059, which covers Command and Scripting Interpreter. Organizations should also consider implementing application whitelisting policies to prevent unauthorized execution of potentially vulnerable utilities and maintain up-to-date system patch management procedures to address similar vulnerabilities in the future.