CVE-1999-0137 in DIP
Summary
by MITRE
the dip program on many linux systems allows local users to gain root access via a buffer overflow.
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Analysis
by VulDB Data Team • 09/24/2024
The vulnerability described in CVE-1999-0137 represents a critical buffer overflow flaw within the dip program found on numerous linux systems. This issue stems from inadequate input validation mechanisms within the dip utility which is designed to handle network interface configuration and management tasks. The buffer overflow vulnerability occurs when the program processes user-supplied input without proper bounds checking, allowing malicious actors to overwrite adjacent memory locations in the program's execution space.
The technical exploitation of this vulnerability leverages the fundamental weakness in memory management practices within the dip program's code implementation. When local users provide specially crafted input to the dip utility, the program fails to validate the length of the input data against the allocated buffer size, creating an exploitable condition where arbitrary code execution becomes possible. This particular flaw falls under the CWE-121 category of stack-based buffer overflow, where the program writes beyond the boundaries of a fixed-length buffer allocated on the stack. The vulnerability's impact is amplified because it allows local users to escalate their privileges to root level access, bypassing normal system security controls and authentication mechanisms.
The operational implications of this vulnerability extend beyond simple privilege escalation to encompass complete system compromise. Attackers can leverage this weakness to gain unauthorized administrative access to affected systems, potentially leading to data exfiltration, system modification, or establishment of persistent backdoors. The local nature of the attack means that any user with access to the system can exploit this vulnerability, making it particularly dangerous in multi-user environments where privilege separation is essential for security. This vulnerability directly maps to attack techniques documented in the MITRE ATT&CK framework under privilege escalation tactics, specifically targeting the execution of malicious code with elevated privileges.
Mitigation strategies for this vulnerability require immediate implementation of system updates and patches provided by the respective Linux distributions. System administrators should disable or remove the dip program from systems where it is not essential for network configuration operations. Additionally, implementing proper input validation and bounds checking mechanisms within the program's source code would prevent similar buffer overflow conditions from occurring. The vulnerability highlights the importance of secure coding practices and regular security audits of system utilities. Organizations should also consider implementing privilege separation techniques and monitoring for unusual system activity that might indicate exploitation attempts. The remediation process should include comprehensive system hardening measures and regular vulnerability assessments to identify similar weaknesses in other system components.