CVE-2014-4805 in DB2
Summary
by MITRE
IBM DB2 10.5 before FP4 on Linux and AIX creates temporary files during CDE table LOAD operations, which allows local users to obtain sensitive information by reading a file while a LOAD is occurring.
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Analysis
by VulDB Data Team • 02/15/2022
The vulnerability identified as CVE-2014-4805 affects IBM DB2 10.5 before fix pack 4 on Linux and AIX operating systems, specifically during CDE (Common Data Entry) table load operations. This issue represents a significant security flaw that arises from improper handling of temporary files created during database operations. The vulnerability stems from the database management system's failure to properly secure temporary file creation processes, creating opportunities for unauthorized information disclosure.
The technical flaw manifests when DB2 executes CDE table load operations, which inherently require the creation of temporary files to store intermediate data during the loading process. These temporary files are created with insufficient permissions or are not properly secured, allowing local users to access them while the load operation is in progress. The vulnerability specifically exploits the timing window between temporary file creation and proper file permission setting, enabling attackers to read sensitive information that should remain confidential. This type of flaw falls under the CWE-276 category of incorrect permission assignment, where temporary files are created with overly permissive access controls.
The operational impact of this vulnerability extends beyond simple information disclosure, as the sensitive data potentially accessible through this attack vector could include database credentials, user information, or other confidential operational details. Local users who can execute the load operation or who have access to the system during the vulnerable window can exploit this weakness to gain unauthorized access to potentially critical information. The vulnerability is particularly concerning in enterprise environments where DB2 is used for mission-critical applications, as it provides an attack surface that could be leveraged for further compromise. This weakness aligns with ATT&CK technique T1005 by enabling data collection through unauthorized file access, and T1083 by potentially exposing sensitive system information.
Mitigation strategies for CVE-2014-4805 should focus on applying the appropriate IBM fix pack 4 or later to resolve the vulnerability. Organizations should also implement proper file system permissions and access controls, ensuring that temporary files are created with appropriate security settings. System administrators should monitor and restrict access to database load operations, particularly when sensitive data is involved. Additionally, implementing proper logging and monitoring of database operations can help detect unauthorized access attempts to temporary files. The vulnerability highlights the importance of proper temporary file handling in database systems and reinforces the need for comprehensive security testing of database management systems, particularly during operations that involve temporary file creation and data processing. Organizations should also consider implementing network segmentation and access controls to limit local user access to database systems where such vulnerabilities may exist.