CVE-2005-0701 in Database Server
Summary
by MITRE
Directory traversal vulnerability in Oracle Database Server 8i and 9i allows remote attackers to read or rename arbitrary files via "\\.\\.." (modified dot dot backslash) sequences to UTL_FILE functions such as (1) UTL_FILE.FOPEN or (2) UTL_FILE.frename.
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Analysis
by VulDB Data Team • 07/01/2021
The vulnerability identified as CVE-2005-0701 represents a critical directory traversal flaw within Oracle Database Server versions 8i and 9i that exposes systems to remote exploitation through improper input validation in file handling operations. This weakness specifically targets the UTL_FILE package functions that manage file system interactions, creating an avenue for attackers to bypass normal file access controls and potentially gain unauthorized access to sensitive data or system resources.
The technical implementation of this vulnerability stems from inadequate sanitization of file path inputs within the UTL_FILE.FOPEN and UTL_FILE.FRENAME functions. Attackers can exploit this by crafting malicious file paths containing the "\.\.." sequence pattern, which when processed by the database server, allows them to traverse directory structures beyond the intended file access boundaries. This modified dot dot backslash technique exploits the way the database server interprets path traversal sequences, effectively enabling attackers to access files outside of the designated file system scope.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it can potentially lead to complete system compromise when combined with other exploitation techniques. An attacker who successfully exploits this vulnerability can read arbitrary files from the database server's file system, potentially accessing configuration files, password hashes, or sensitive business data stored on the system. The ability to rename files through UTL_FILE.FRENAME further amplifies the threat, as it could enable attackers to modify critical system files or create malicious file replacements that persist across system restarts.
This vulnerability aligns with CWE-22, which categorizes directory traversal weaknesses, and demonstrates how improper input validation in file system operations can create security bypass opportunities. From an adversarial perspective, this flaw maps to ATT&CK technique T1074.001, which involves data staging through file system access, and T1566.001, representing spearphishing with a malicious attachment that could leverage this vulnerability to escalate privileges. The attack vector requires network access to the database server and typically involves crafting malicious SQL statements that invoke the vulnerable UTL_FILE functions with crafted path parameters.
Organizations should implement immediate mitigations including applying Oracle's security patches, restricting database user privileges to minimize potential impact, and implementing network segmentation to limit access to database servers. Database administrators should also disable unnecessary UTL_FILE functionality when not required, implement strict input validation for all file system operations, and conduct comprehensive security audits of database configurations. Additionally, monitoring for unusual file access patterns and implementing intrusion detection systems can help identify potential exploitation attempts. The vulnerability serves as a critical reminder of the importance of proper input validation in database applications and the need for regular security updates to protect against known exploitation techniques.