CVE-2009-3854 in Tivoli Storage Manager
Summary
by MITRE
Buffer overflow in the traditional client scheduler in the client in IBM Tivoli Storage Manager (TSM) 5.3 before 5.3.6.7 and 5.4 before 5.4.2 allows remote attackers to execute arbitrary code via unspecified vectors.
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Analysis
by VulDB Data Team • 03/01/2025
The vulnerability identified as CVE-2009-3854 represents a critical buffer overflow flaw within the traditional client scheduler component of IBM Tivoli Storage Manager versions 5.3 prior to 5.3.6.7 and 5.4 prior to 5.4.2. This issue resides in the client-side implementation of the storage management solution, specifically affecting the scheduler module responsible for coordinating backup and recovery operations. The buffer overflow occurs when the client scheduler processes input data from remote sources, creating an exploitable condition that could allow malicious actors to gain unauthorized system access. The vulnerability's severity is amplified by its remote exploitability, meaning attackers do not require local system access to leverage the flaw. This particular vulnerability falls under CWE-121, which describes classic buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The impact extends beyond simple code execution as it enables potential privilege escalation and system compromise. The traditional client scheduler in Tivoli Storage Manager serves as a critical component for managing backup schedules and storage operations across distributed environments, making this vulnerability particularly dangerous for organizations relying on automated backup processes.
The technical implementation of this buffer overflow stems from inadequate input validation within the client scheduler's processing routines. When the scheduler receives data from remote TSM servers or network sources, it fails to properly validate the length and content of incoming buffers before copying data into fixed-size memory locations. This allows an attacker to craft malicious input that exceeds the allocated buffer space, causing memory corruption and potentially enabling arbitrary code execution. The flaw manifests in the client-side software stack where the scheduler module handles various network protocols and data formats used for communication with the TSM server. Attackers can exploit this vulnerability through unspecified vectors that likely involve sending specially crafted network packets or data structures to the vulnerable client system. The memory corruption resulting from the buffer overflow can overwrite critical program execution pointers, return addresses, or other control structures, allowing attackers to redirect program flow and execute malicious code with the privileges of the affected client process. This type of vulnerability is particularly challenging to detect and mitigate as it can be triggered through legitimate network communications and may not immediately manifest obvious symptoms during normal operation.
The operational impact of CVE-2009-3854 extends far beyond simple system compromise, as it affects the fundamental integrity of data protection and backup operations within organizations using IBM Tivoli Storage Manager. When exploited, this vulnerability allows remote attackers to execute arbitrary code on client systems, potentially leading to complete system takeover and unauthorized access to backed-up data. The implications are severe for enterprise environments where TSM clients are deployed across multiple systems and networks, as a successful exploitation on one client could provide attackers with a foothold for lateral movement within the organization. Organizations relying on automated backup schedules could face catastrophic data loss or exposure if attackers compromise the client scheduler functionality, potentially disrupting critical business operations and violating data protection regulations. The vulnerability's remote exploitability means that attackers can target systems from outside the organization's network perimeter, making traditional network security measures insufficient for protection. This flaw directly impacts the availability, confidentiality, and integrity of backup data, as attackers could potentially modify backup schedules, delete backup data, or gain access to sensitive information stored in the backup repositories.
Mitigation strategies for CVE-2009-3854 require immediate attention and comprehensive implementation across affected IBM Tivoli Storage Manager environments. The primary and most effective mitigation involves upgrading to IBM Tivoli Storage Manager versions 5.3.6.7 or 5.4.2, which contain the necessary patches addressing the buffer overflow vulnerability. Organizations should also implement network segmentation and access controls to limit exposure of TSM client systems to untrusted networks, reducing the attack surface for remote exploitation attempts. Network monitoring should be enhanced to detect unusual traffic patterns or malformed data packets that might indicate exploitation attempts targeting the scheduler component. Additionally, implementing intrusion detection systems with signature-based detection capabilities can help identify and block known exploit patterns associated with this vulnerability. Security teams should conduct thorough vulnerability assessments of all TSM client installations to identify systems running vulnerable versions and prioritize remediation efforts based on risk assessment. The implementation of application whitelisting policies can further protect against exploitation by preventing unauthorized code execution on client systems. Organizations should also review and update their incident response procedures to ensure rapid detection and containment of potential exploitation attempts, as the vulnerability's remote nature requires proactive monitoring and rapid response capabilities. This vulnerability demonstrates the critical importance of maintaining up-to-date security patches and implementing comprehensive security monitoring across all enterprise systems. The ATT&CK framework categorizes this vulnerability under T1059 for command and scripting interpreter and T1068 for exploit for privilege escalation, highlighting the multi-stage attack vectors that can be leveraged once the initial buffer overflow is successfully exploited.