CVE-2008-7283 in OTRS
Summary
by MITRE
Open Ticket Request System (OTRS) before 2.2.6, when customer group support is enabled, allows remote authenticated users to bypass intended access restrictions and perform web-interface updates to tickets by leveraging queue read permissions.
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Analysis
by VulDB Data Team • 10/19/2021
The Open Ticket Request System OTRS vulnerability CVE-2008-7283 represents a critical access control flaw that undermines the security model of the ticketing system when customer group support is enabled. This vulnerability affects versions prior to 2.2.6 and demonstrates a fundamental weakness in the authorization mechanisms that govern user permissions within the system. The flaw specifically targets the interaction between queue read permissions and ticket update capabilities, creating an unexpected pathway for authenticated attackers to escalate their privileges and perform unauthorized operations.
The technical implementation of this vulnerability stems from improper validation of user permissions when customer group support is active. When users possess read-only access to specific queues, the system incorrectly allows them to manipulate ticket data through the web interface despite lacking explicit update permissions. This represents a classic privilege escalation issue where the system fails to properly enforce the principle of least privilege. The vulnerability manifests when the application does not adequately verify whether a user has the necessary permissions to modify ticket attributes, instead relying on incomplete or flawed permission checks that are bypassed when customer groups are configured.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it enables attackers to modify critical ticket information including status changes, assignments, and resolution details. This capability can be exploited to manipulate support workflows, hide malicious activities, or disrupt service delivery processes. The vulnerability is particularly concerning because it requires only authenticated access, meaning that an attacker who has obtained legitimate credentials can leverage this flaw to perform unauthorized actions within the system. This scenario aligns with ATT&CK technique T1078 for valid accounts and T1484 for domain policy modification, as it exploits legitimate user access to gain elevated privileges.
Security professionals should note that this vulnerability directly relates to CWE-284, which addresses improper access control, and CWE-285, which covers insufficient permissions or privileges. The flaw demonstrates how seemingly minor configuration options can create significant security gaps when combined with existing permission models. Organizations using OTRS with customer group support enabled should prioritize immediate patching to address this vulnerability. The remediation process involves upgrading to version 2.2.6 or later, where the permission checking mechanisms have been strengthened to properly validate user capabilities before allowing ticket modifications. Additionally, security teams should implement network segmentation and monitoring to detect unauthorized ticket modifications, while reviewing existing user permissions to ensure that read-only access is properly enforced. This vulnerability serves as a reminder of the importance of comprehensive permission testing and the need for security reviews of all system configurations, particularly those involving user groups and role-based access controls.