CVE-2003-0611 in Xtokkaetama
Summary
by MITRE
Multiple buffer overflows in xtokkaetama 1.0 allow local users to gain privileges via a long (1) -display command line argument or (2) XTOKKAETAMADIR environment variable.
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Analysis
by VulDB Data Team • 11/27/2024
The vulnerability described in CVE-2003-0611 represents a critical buffer overflow issue affecting the xtokkaetama 1.0 software implementation. This flaw manifests in two distinct attack vectors that exploit improper input validation mechanisms within the application's command line argument processing and environment variable handling. The vulnerability specifically targets local users who can leverage these flaws to escalate their privileges on the affected system. The software's failure to properly validate the length of command line arguments and environment variables creates exploitable conditions that can be leveraged by malicious actors with local access to the system.
The technical implementation of this vulnerability stems from inadequate bounds checking within the xtokkaetama application's input processing routines. When the application receives a command line argument using the -display flag or when it processes the XTOKKAETAMADIR environment variable, it fails to validate the length of these inputs against predetermined buffer boundaries. This oversight results in a classic stack-based buffer overflow condition where maliciously crafted input data can overwrite adjacent memory locations, potentially including return addresses, function pointers, or other critical control data structures. The vulnerability operates under CWE-121, which specifically addresses stack-based buffer overflow conditions, and aligns with ATT&CK technique T1068 which covers privilege escalation through exploitation of system vulnerabilities.
The operational impact of this vulnerability extends beyond simple denial of service scenarios to encompass full privilege escalation capabilities for local attackers. Successful exploitation of these buffer overflows can enable attackers to execute arbitrary code with elevated privileges, potentially allowing them to gain root access or administrative control over the affected system. The local nature of the attack means that an attacker must already have access to the system, but once exploited, the vulnerability provides a pathway to significantly elevate their privileges within the operating environment. This makes the vulnerability particularly dangerous in multi-user environments where local access might be obtained through legitimate means such as user accounts or shared system resources.
Mitigation strategies for this vulnerability should focus on immediate patching of the affected xtokkaetama software to address the buffer overflow conditions in both command line argument processing and environment variable handling. System administrators should implement input validation controls that enforce maximum length limits for all command line arguments and environment variables processed by the application. The implementation of stack canaries, address space layout randomization, and other exploit mitigation techniques can provide additional layers of protection against exploitation attempts. Additionally, regular security audits of system applications should include comprehensive input validation reviews to identify similar buffer overflow vulnerabilities that may exist in other software components. Organizations should also consider implementing least privilege principles to limit the potential impact of successful exploitation, ensuring that local users have minimal system access rights that would limit the damage from privilege escalation attempts.