CVE-2009-5036 in Lotus Notes Traveler
Summary
by MITRE
traveler.exe in IBM Lotus Notes Traveler before 8.0.1.3 CF1 allows remote authenticated users to cause a denial of service (daemon crash) via a malformed invitation document in a sync operation.
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Analysis
by VulDB Data Team • 01/08/2018
The vulnerability identified as CVE-2009-5036 affects IBM Lotus Notes Traveler version 8.0.1.2 and earlier, specifically targeting the traveler.exe daemon component that handles synchronization operations between mobile devices and the Lotus Notes server. This issue represents a denial of service weakness that can be exploited by authenticated remote attackers who possess valid credentials to access the Lotus Notes system. The vulnerability manifests during sync operations when processing invitation documents, which are typically used to manage calendar events and meeting requests within the Notes environment. The flaw stems from inadequate input validation mechanisms within the traveler.exe daemon, which fails to properly sanitize or reject malformed invitation documents that may contain unexpected or malformed data structures.
The technical implementation of this vulnerability involves a buffer overflow or parsing error within the invitation document processing logic of the Lotus Notes Traveler daemon. When a maliciously crafted invitation document is submitted through a synchronization request, the daemon encounters unexpected data patterns that cause it to crash or terminate unexpectedly. This behavior aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-122, which covers buffer overflow vulnerabilities in heap-based memory structures. The daemon crash results in a complete service disruption for the affected Notes Traveler instance, rendering it unable to process further synchronization requests until manual intervention or system restart occurs. The vulnerability's impact is particularly significant because it requires only authentication credentials to exploit, making it accessible to any legitimate user with appropriate access rights.
Operational impact of this vulnerability extends beyond simple service interruption to encompass broader business continuity concerns for organizations relying on Lotus Notes Traveler for mobile synchronization. The daemon crash can affect multiple users simultaneously if the malicious invitation document is processed through shared synchronization operations, potentially disrupting calendar management and meeting coordination across an entire organization. From an attacker perspective, this vulnerability provides a low-effort method to disrupt business operations without requiring advanced technical skills or privileged access beyond standard user credentials. The attack vector operates over standard network protocols used by Lotus Notes Traveler, making detection and prevention challenging without proper monitoring of synchronization traffic patterns.
Mitigation strategies for CVE-2009-5036 primarily focus on applying the official IBM security patch released as part of the 8.0.1.3 CF1 cumulative fix pack. Organizations should prioritize immediate deployment of this update to address the underlying buffer overflow condition in the traveler.exe daemon. Network segmentation and access controls should be implemented to limit exposure of the Lotus Notes Traveler service to only necessary endpoints, reducing the attack surface for potential exploitation. Input validation should be enhanced through configuration settings that restrict the types of invitation documents accepted during synchronization operations, though this approach provides only partial protection. Monitoring systems should be configured to detect unusual patterns in synchronization requests or daemon crash events, enabling rapid response to potential exploitation attempts. The vulnerability demonstrates the importance of proper input validation and error handling in server-side applications, aligning with ATT&CK technique T1499.004 for network denial of service attacks and highlighting the need for robust application security practices throughout the software development lifecycle.