CVE-2005-3013 in Linux
Summary
by MITRE
Buffer overflow in liby2util in Yet another Setup Tool (YaST) for SuSE Linux 9.3 allows local users to execute arbitrary code via a long Loc entry.
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Analysis
by VulDB Data Team • 07/06/2021
The vulnerability identified as CVE-2005-3013 represents a critical buffer overflow flaw within the liby2util library component of Yet Another Setup Tool version 2.17.12 found in SuSE Linux 9.3. This issue resides in the handling of locale entries during system configuration processes, creating a pathway for local privilege escalation through maliciously crafted input. The vulnerability specifically affects the YaST setup utility which is integral to SuSE Linux system administration and configuration management.
The technical implementation of this buffer overflow stems from inadequate input validation within the locale processing functionality of liby2util. When the system encounters a Loc entry exceeding predetermined buffer boundaries, memory corruption occurs that can be exploited by local attackers to overwrite adjacent memory segments. This flaw operates at the kernel level where the YaST tool interacts with system configuration parameters, making it particularly dangerous as it can be leveraged to execute arbitrary code with the privileges of the target process. The vulnerability is classified as a classic stack-based buffer overflow with potential for privilege escalation, aligning with CWE-121 which defines buffer overflow conditions where insufficient boundary checking allows data to overwrite adjacent memory locations.
Operationally, this vulnerability presents significant risks to SuSE Linux 9.3 systems as local users who can access the YaST interface or related configuration utilities can exploit this weakness to gain elevated privileges. The attack vector requires local system access but does not demand network connectivity, making it particularly concerning for environments where user access controls may be insufficient. The impact extends beyond simple code execution to potentially allow attackers to modify system configuration files, install malicious software, or establish persistent access points. This vulnerability undermines the fundamental security model of the operating system by enabling privilege escalation without requiring additional authentication or external attack vectors.
Mitigation strategies for CVE-2005-3013 should prioritize immediate patching of affected SuSE Linux 9.3 systems through official vendor updates. System administrators should implement strict access controls to limit local user privileges and monitor for unusual system configuration changes. Network segmentation and privilege separation practices can help reduce the attack surface. The vulnerability demonstrates the importance of input validation and proper boundary checking in system utilities, aligning with ATT&CK technique T1068 which covers privilege escalation through local exploitation of system vulnerabilities. Organizations should also conduct comprehensive vulnerability assessments to identify similar buffer overflow conditions in other system components and ensure proper code review processes are implemented to prevent such issues in future development cycles.