CVE-2018-20800 in Open Ticket Request System
Summary
by MITRE
An issue was discovered in Open Ticket Request System (OTRS) 5.0.31 and 6.0.13. Users updating to 6.0.13 (also patchlevel updates) or 5.0.31 (only major updates) will experience data loss in their agent preferences table.
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Analysis
by VulDB Data Team • 08/01/2023
The Open Ticket Request System OTRS vulnerability CVE-2018-20800 represents a critical data integrity issue affecting version 5.0.31 and 6.0.13 of the popular help desk software. This vulnerability specifically targets the agent preferences table within the system's database, creating a scenario where legitimate user configuration data becomes permanently lost during software update processes. The flaw manifests when users attempt to upgrade their OTRS installations to the affected versions, particularly when applying patchlevel updates to 6.0.13 or major updates to 5.0.31. The vulnerability operates at the database schema level where the update procedures fail to properly handle existing agent preference records, resulting in irreversible data corruption that impacts user experience and system functionality.
This security flaw falls under the category of data loss and database integrity issues, with direct implications for CWE-691, which addresses insufficient protection of data during software updates. The vulnerability demonstrates a classic case of inadequate backward compatibility in update mechanisms where the database migration process fails to account for existing user configurations. The technical implementation error occurs during the upgrade routine when the system attempts to modify or restructure the agent preferences table without proper data preservation protocols. This creates a scenario where user-specific settings, including interface preferences, notification configurations, and access permissions, are permanently deleted from the database. The issue is particularly concerning as it affects the core user experience functionality of the help desk system, rendering agent preferences ineffective and potentially disrupting workflow processes.
The operational impact of CVE-2018-20800 extends beyond simple data loss to encompass significant business continuity concerns for organizations relying on OTRS for their ticket management operations. When agents encounter this vulnerability during update procedures, their personalized configurations become inaccessible, forcing them to manually reconfigure their preferences across multiple systems. This disruption can lead to decreased productivity and increased support overhead as administrators must restore user settings manually or through backup procedures. The vulnerability also creates audit and compliance challenges, as organizations may lose track of user-specific configurations that are often required for regulatory compliance. From an attack surface perspective, this issue could potentially be exploited by malicious actors who might attempt to manipulate update processes to cause unauthorized data loss, although the primary threat is accidental data corruption during legitimate upgrade operations.
Organizations affected by CVE-2018-20800 should immediately implement comprehensive mitigation strategies focusing on data backup and recovery procedures. The recommended approach involves creating full database backups before any upgrade activities, particularly when transitioning to the vulnerable versions. System administrators should consider implementing automated backup solutions that capture both database schemas and user preference configurations. Additionally, organizations should develop detailed recovery procedures that include restoring agent preferences from backup copies and validating configuration integrity post-upgrade. The vulnerability highlights the importance of thorough testing in staging environments before deploying updates to production systems. Organizations should also consider implementing configuration management tools that can track and maintain user preferences separately from the database, providing additional protection against similar issues. From a security framework perspective, this vulnerability aligns with ATT&CK technique T1485, which addresses data manipulation and the potential for data loss through system updates, emphasizing the need for robust change management processes and validation checks during software maintenance operations.