CVE-2008-3248 in Veritas File System
Summary
by MITRE
qiomkfile in the Quick I/O for Database feature in Symantec Veritas File System (VxFS) on HP-UX, and before 5.0 MP3 on Solaris, Linux, and AIX, does not initialize filesystem blocks during creation of a file, which allows local users to obtain sensitive information by creating and then reading files.
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Analysis
by VulDB Data Team • 11/28/2017
The vulnerability identified as CVE-2008-3248 represents a critical information disclosure flaw within Symantec Veritas File System implementations across multiple operating systems. This issue affects the qiomkfile component within the Quick I/O for Database feature, which is designed to optimize database file operations through specialized I/O handling mechanisms. The vulnerability manifests when filesystem blocks are created without proper initialization, leaving residual data from previous operations accessible to unauthorized users within the same system. This particular flaw falls under the CWE-200 category of "Information Exposure" and specifically relates to improper initialization of resources, making it a classic example of how seemingly minor implementation oversights can lead to significant security consequences. The vulnerability impacts HP-UX systems running Symantec Veritas File System and extends to various Unix platforms including Solaris, Linux, and AIX, with the affected versions predating the 5.0 MP3 release.
The technical exploitation of this vulnerability occurs through a straightforward yet effective method where local users can create new files and subsequently read them to access data that was previously stored in the same filesystem blocks. This happens because the qiomkfile function fails to zero out or properly initialize the memory blocks before making them available for new file creation. The uninitialized blocks retain data from previous file operations, potentially exposing sensitive information such as passwords, database records, encryption keys, or other confidential data that may have been stored in those memory locations. This type of information leakage is particularly concerning in database environments where the Quick I/O for Database feature is commonly deployed, as it can compromise entire database contents and expose critical business information. The attack vector is classified as local privilege escalation since it requires system-level access but does not require elevated privileges beyond normal user accounts, making it accessible to any user with filesystem creation capabilities.
The operational impact of this vulnerability extends far beyond simple information disclosure, as it can compromise the integrity and confidentiality of entire database systems. When combined with other attack vectors, this vulnerability can provide attackers with valuable reconnaissance data that could facilitate more sophisticated attacks. The vulnerability affects database performance and reliability since it essentially creates a persistent data leak that could be exploited over time to gather increasingly valuable information. In enterprise environments where Symantec Veritas File System is deployed for database operations, this vulnerability represents a significant risk to data protection and compliance requirements, particularly in regulated industries where information disclosure can lead to severe financial and legal consequences. The vulnerability also demonstrates the importance of proper memory management and resource initialization in file system implementations, as the flaw exists at the core I/O handling mechanism rather than being a peripheral security issue.
Mitigation strategies for CVE-2008-3248 require immediate implementation of vendor-provided patches and updates for all affected Symantec Veritas File System versions. System administrators should prioritize patching across all supported platforms including HP-UX, Solaris, Linux, and AIX, ensuring that systems are updated to version 5.0 MP3 or later where the initialization issue has been resolved. Organizations should also implement monitoring solutions to detect potential exploitation attempts and establish baseline configurations that prevent unnecessary file creation capabilities for non-privileged users. Security hardening procedures should include regular filesystem integrity checks and memory scrubbing processes to minimize the risk of residual data exposure. Additionally, system administrators should conduct comprehensive vulnerability assessments to identify other potential uninitialized resource issues within the file system and related I/O components. The vulnerability serves as a reminder of the critical importance of proper resource initialization in system security, as outlined in various security frameworks including the ATT&CK framework's focus on privilege escalation and information gathering techniques. Organizations should also consider implementing additional layers of protection such as filesystem encryption and access control measures to reduce the impact of such information disclosure vulnerabilities.