CVE-2001-0300 in Internet Directory
Summary
by MITRE
oidldapd 2.1.1.1 in Oracle 8.1.7 records log files in a directory (ldaplog) that has world-writable permissions, which may allow local users to delete logs and/or overwrite other files via a symlink attack.
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Analysis
by VulDB Data Team • 11/12/2024
The vulnerability identified as CVE-2001-0300 represents a critical security flaw in Oracle 8.1.7's oidldapd component version 2.1.1.1. This issue stems from improper directory permissions that create an exploitable condition within the Oracle database environment. The affected component operates as part of Oracle's directory services infrastructure, specifically managing ldaplog directory contents that are essential for audit and monitoring purposes. The vulnerability manifests when the ldaplog directory is configured with world-writable permissions, creating a fundamental security misconfiguration that undermines the integrity of the logging mechanism.
The technical exploitation of this vulnerability relies on a classic symlink attack vector that leverages the insecure directory permissions. When local users can write to the ldaplog directory, they can create symbolic links that point to critical system files or other sensitive locations. This allows attackers to either delete legitimate log files that would otherwise be protected from modification or overwrite arbitrary files on the system with malicious content. The flaw operates at the file system level where the application fails to validate the target of symbolic links during log file creation, enabling privilege escalation through file system manipulation. This vulnerability directly maps to CWE-73, which addresses "External Control of File Name or Path" and aligns with ATT&CK technique T1566.001 for "Phishing via Service" as attackers could exploit this to obscure their activities through log manipulation.
The operational impact of this vulnerability extends beyond simple log file manipulation to encompass broader system integrity concerns and audit trail compromise. Attackers with local access can potentially disrupt system monitoring by deleting log entries that would normally be preserved for security analysis and compliance purposes. The ability to overwrite files through symlink attacks could allow malicious users to modify critical system components, configuration files, or application binaries, leading to persistent access or system compromise. Organizations relying on Oracle 8.1.7 for directory services face significant risk as this vulnerability can be exploited by any local user, including potentially compromised accounts or insider threats. The impact is particularly severe in enterprise environments where Oracle directory services are integral to authentication and authorization processes, as the vulnerability could enable attackers to manipulate the very systems that enforce access controls.
Mitigation strategies for CVE-2001-0300 require immediate implementation of proper directory permissions and access controls. System administrators should ensure that the ldaplog directory and all associated log files are configured with restrictive permissions that prevent world-writable access. The recommended approach involves setting appropriate ownership and permissions using standard unix/linux file system controls, typically restricting write access to the specific application user or group responsible for log management. Additionally, implementing proper input validation and path resolution checks within the oidldapd application can prevent symlink attacks from succeeding. Organizations should also consider implementing monitoring solutions to detect unauthorized access attempts to log directories and establish regular audits of file system permissions. The vulnerability highlights the importance of least privilege principles and proper security hardening of database components, emphasizing that even legacy systems require careful attention to file system security controls. This remediation approach addresses both the immediate exploitation vector and establishes defensive measures against similar future vulnerabilities in the Oracle directory services infrastructure.