CVE-2003-0652 in xtokkaetama
Summary
by MITRE
Buffer overflow in xtokkaetama allows local users to gain privileges via a long -nickname command line argument, a different vulnerability than CVE-2003-0611.
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Analysis
by VulDB Data Team • 04/22/2019
The vulnerability described in CVE-2003-0652 represents a classic buffer overflow flaw within the xtokkaetama application that enables local privilege escalation through malicious command line arguments. This issue specifically manifests when users provide an excessively long -nickname parameter during program execution, creating a condition where memory boundaries are exceeded and potentially allowing unauthorized access to elevated system privileges. The vulnerability operates within the context of local user execution, meaning that an attacker must already have access to the system to exploit this weakness, but once exploited, can result in privilege elevation.
The technical implementation of this buffer overflow stems from inadequate input validation and bounds checking within the command line argument processing mechanism of xtokkaetama. When the program receives a -nickname argument that exceeds the allocated buffer size, the excess data overflows into adjacent memory locations, potentially corrupting program state or overwriting critical control data such as return addresses or privilege levels. This type of vulnerability falls under CWE-121, which specifically addresses stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite memory and potentially execute arbitrary code. The flaw demonstrates a fundamental weakness in input sanitization and memory management practices that were common in software development during the early 2000s.
From an operational impact perspective, this vulnerability presents a significant security risk for systems running xtokkaetama where local users might attempt to exploit the privilege escalation vector. The local nature of the attack means that an attacker must first gain access to the system through other means such as legitimate user accounts or compromised credentials before attempting to leverage this specific vulnerability. However, the potential for privilege escalation makes this a particularly dangerous flaw in environments where users might have legitimate access to the system but should not possess elevated privileges. The vulnerability could be exploited to gain root or administrative access to the system, allowing attackers to execute commands with the highest possible privileges and potentially compromise the entire system.
Mitigation strategies for CVE-2003-0652 should focus on both immediate patching and broader security hardening measures. The most effective immediate solution involves applying vendor-specific patches or updates that address the buffer overflow in the xtokkaetama application, ensuring proper input validation and bounds checking for all command line arguments. System administrators should implement strict input validation controls that enforce maximum length limits for user-supplied parameters and employ stack protection mechanisms such as stack canaries or address space layout randomization. Additionally, the principle of least privilege should be enforced to limit local user access to only necessary system resources, reducing the potential impact of successful exploitation attempts. The vulnerability also highlights the importance of proper code review processes and security testing methodologies that can identify such memory corruption flaws before they can be exploited in production environments. Organizations should also consider implementing monitoring and logging mechanisms to detect unusual command line argument patterns that might indicate attempted exploitation of similar buffer overflow vulnerabilities.