CVE-2011-1222 in Tivoli Storage Manager
Summary
by MITRE
Buffer overflow in the Journal Based Backup (JBB) feature in the backup-archive client in IBM Tivoli Storage Manager (TSM) before 5.4.3.4, 5.5.x before 5.5.3, 6.x before 6.1.4, and 6.2.x before 6.2.2 on Windows and AIX allows local users to gain privileges via unspecified vectors.
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Analysis
by VulDB Data Team • 08/04/2024
The vulnerability identified as CVE-2011-1222 represents a critical buffer overflow flaw within the Journal Based Backup (JBB) functionality of IBM Tivoli Storage Manager (TSM) client software. This security weakness exists in multiple versions of the TSM backup-archive client across both Windows and AIX operating systems, affecting releases prior to specific patch levels including 5.4.3.4, 5.5.3, 6.1.4, and 6.2.2. The JBB feature is designed to provide incremental backup capabilities by tracking changes to files and directories, making it a core component of the backup process that requires elevated privileges to function properly. The buffer overflow vulnerability specifically occurs within the client-side implementation of this backup mechanism, creating an opportunity for exploitation that could lead to privilege escalation.
The technical nature of this buffer overflow stems from inadequate input validation and memory management within the JBB component of the TSM client. When processing backup operations, the software fails to properly bounds-check data structures that handle journal entries and backup metadata, allowing attackers to overflow buffers and potentially overwrite adjacent memory regions. This flaw can be exploited through unspecified vectors that likely involve manipulating backup parameters or journal file contents during the backup process. The vulnerability's classification aligns with CWE-121, which describes stack-based buffer overflow conditions, and potentially CWE-122 for heap-based buffer overflows that may occur during dynamic memory allocation. Attackers could leverage this weakness to execute arbitrary code with elevated privileges, as the backup client typically operates with administrative permissions necessary for file system access and backup operations.
The operational impact of this vulnerability extends beyond simple privilege escalation to potentially compromise entire backup environments and data integrity. Local users with access to the system can exploit this flaw to gain elevated privileges, which could then be used to access sensitive backup data, modify backup configurations, or even corrupt backup archives. In enterprise environments where TSM is deployed for critical data protection, this vulnerability represents a significant risk as it could allow attackers to undermine backup integrity and potentially facilitate data loss or theft. The attack surface is particularly concerning given that the vulnerability exists in the client-side backup software that typically runs with elevated privileges, meaning successful exploitation could provide attackers with access to the full backup catalog and potentially enable them to bypass traditional security controls that rely on backup system integrity. This aligns with ATT&CK technique T1059.001 for command and scripting interpreter, as exploitation may involve manipulating backup processes to execute malicious code, and T1548.002 for abuse of backup software for privilege escalation.
Organizations utilizing IBM Tivoli Storage Manager should prioritize immediate patching of affected systems to address this vulnerability, as the potential for privilege escalation and data compromise makes this a high-priority security concern. The recommended mitigation strategy includes applying the vendor-provided patches that address the buffer overflow conditions in the JBB implementation, ensuring that all affected TSM client versions are updated to supported releases. System administrators should also implement additional monitoring for unusual backup activity or privilege escalation attempts that could indicate exploitation attempts. Network segmentation and privilege separation measures should be reviewed to limit the potential impact of successful exploitation, particularly given that the vulnerability affects multiple major versions of the TSM software. Regular vulnerability assessments should be conducted to identify any remaining instances of unpatched systems, as the nature of backup systems makes them attractive targets for attackers seeking persistent access to enterprise data environments.