CVE-2011-1008 in Bestpractical
Summary
by MITRE
Scrips_Overlay.pm in Best Practical Solutions RT before 3.8.9 does not properly restrict access to a TicketObj in a Scrip after a CurrentUser change, which allows remote authenticated users to obtain sensitive information via unspecified vectors, as demonstrated by custom-field value information, related to SQL logging.
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Analysis
by VulDB Data Team • 10/18/2021
The vulnerability identified as CVE-2011-1008 affects the Scrips_Overlay.pm component within Best Practical Solutions RT (Request Tracker) versions prior to 3.8.9. This represents a critical access control flaw that undermines the security model of the ticketing system by failing to properly enforce permissions when a user context changes during script execution. The issue manifests specifically when a CurrentUser is modified within a Scrip, creating a window where unauthorized access to ticket objects can occur. This vulnerability falls under the category of improper access control as classified by CWE-284, which addresses inadequate permissions and access restrictions that allow unauthorized users to access resources they should not be able to reach.
The technical flaw stems from the failure of the system to maintain proper isolation between user contexts when processing Scrips, which are automated actions that can be triggered by various events within the RT system. When a CurrentUser is changed during the execution of a Scrip, the system does not properly validate or restrict access to the associated TicketObj, allowing the modified user context to potentially access information that should be restricted based on the original user's permissions. This issue is particularly concerning because it operates at the core of the system's access control mechanisms, where the fundamental principle of least privilege is violated.
The operational impact of this vulnerability is significant as it enables authenticated remote attackers to obtain sensitive information through unspecified vectors that can include custom field value information and SQL logging data. Attackers could exploit this weakness to gather confidential details about tickets, potentially including personal information, business data, or other sensitive attributes stored in custom fields. The SQL logging aspect of the vulnerability is particularly dangerous as it could expose database queries and potentially sensitive data structures that are logged for debugging purposes. This type of information disclosure vulnerability aligns with ATT&CK technique T1005 for data from local system and T1041 for data from network shared drives, though in this case the access occurs through legitimate authenticated channels rather than network-based attacks.
The exploitation of this vulnerability requires an authenticated user account, making it less severe than some zero-day exploits but still highly problematic for organizations relying on RT for sensitive ticket management. The attack vector involves manipulating the CurrentUser context within a Scrip execution flow, which can be achieved through various means including crafting specific requests or leveraging existing administrative capabilities. Organizations using RT versions prior to 3.8.9 should be particularly concerned as this vulnerability could allow attackers to escalate their privileges and access information across multiple tickets, potentially compromising entire ticketing workflows and the confidentiality of sensitive data stored within the system. The remediation involves upgrading to RT version 3.8.9 or later, where proper access controls have been implemented to prevent unauthorized access to ticket objects during CurrentUser changes. This vulnerability demonstrates the importance of maintaining proper access control boundaries even within authenticated sessions and highlights the need for comprehensive security testing of automated script execution flows in enterprise ticketing systems.