CVE-2002-0165 in Logwatch
Summary
by MITRE
LogWatch 2.5 allows local users to gain root privileges via a symlink attack, a different vulnerability than CVE-2002-0162.
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Analysis
by VulDB Data Team • 06/06/2018
The vulnerability identified as CVE-2002-0165 affects LogWatch version 2.5 and represents a critical privilege escalation flaw that enables local users to obtain root access through a carefully crafted symlink attack. This issue specifically targets the log processing and analysis functionality of LogWatch, which is commonly used for monitoring system logs and generating security reports. The vulnerability operates by exploiting the way LogWatch handles symbolic links during its execution process, creating a path traversal scenario that allows unauthorized users to manipulate the system's privilege levels.
The technical implementation of this vulnerability stems from improper handling of symbolic links within LogWatch's file processing routines. When LogWatch executes with root privileges, it processes log files that may contain symbolic links pointing to sensitive system files or directories. A local attacker can create malicious symbolic links in the log directory that, when processed by LogWatch, cause the application to follow these links and potentially overwrite or modify critical system files. This attack vector differs significantly from CVE-2002-0162, which addressed a different privilege escalation mechanism, making CVE-2002-0165 a distinct and equally dangerous vulnerability within the LogWatch software ecosystem.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it can enable attackers to completely compromise system integrity and potentially establish persistent access. Once root privileges are gained, attackers can modify system configurations, install backdoors, access confidential data, or manipulate system logs to cover their tracks. The attack requires only local access to the system, making it particularly dangerous in environments where multiple users have shell access or where system administrators may not properly monitor log file integrity. This vulnerability particularly affects Unix-like systems where LogWatch is commonly deployed for security monitoring and log analysis purposes.
The exploitation of CVE-2002-0165 aligns with several attack patterns documented in the MITRE ATT&CK framework, specifically relating to privilege escalation techniques and local persistence mechanisms. From a CWE perspective, this vulnerability corresponds to CWE-59, which addresses improper handling of symbolic links, and CWE-264, which covers permissions, privileges, and access controls. Organizations should implement immediate mitigations including updating to patched versions of LogWatch, implementing proper file system permissions, and monitoring for suspicious symbolic link creation in log directories. System administrators should also consider implementing additional security controls such as file integrity monitoring and regular log file audits to detect potential exploitation attempts. The vulnerability underscores the importance of secure coding practices and proper input validation when handling file system operations in security tools that execute with elevated privileges.