CVE-2012-1969 in Bugzilla
Summary
by MITRE
The get_attachment_link function in Template.pm in Bugzilla 2.x and 3.x before 3.6.10, 3.7.x and 4.0.x before 4.0.7, 4.1.x and 4.2.x before 4.2.2, and 4.3.x before 4.3.2 does not check whether an attachment is private before presenting the attachment description within a public comment, which allows remote attackers to obtain sensitive description information by reading a comment.
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Analysis
by VulDB Data Team • 03/27/2021
The vulnerability described in CVE-2012-1969 represents a critical information disclosure flaw within the Bugzilla bug tracking system that affects multiple version ranges spanning from 2.x through 4.3.x. This issue resides in the Template.pm file's get_attachment_link function which fails to properly validate access controls for attachments before displaying their descriptions in public comments. The flaw essentially creates a scenario where unauthorized users can access sensitive information that should remain private, fundamentally undermining the system's security model and data protection mechanisms.
The technical implementation of this vulnerability stems from insufficient input validation and access control enforcement within the attachment handling logic. When Bugzilla processes comments that reference attachments, the get_attachment_link function retrieves attachment metadata including descriptions without verifying whether the current user possesses appropriate permissions to view that specific attachment. This oversight creates a direct path for remote attackers to exploit the system by simply reading public comments that contain references to private attachments, thereby extracting confidential information that was intended to be restricted to authorized personnel only. The vulnerability operates at the application layer and can be exploited without requiring authentication or privileged access, making it particularly dangerous in environments where public comments are accessible to unauthenticated users.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially compromise entire security frameworks within organizations using Bugzilla. Attackers can systematically gather sensitive data including bug descriptions, analysis notes, technical specifications, and other confidential information that may reveal system vulnerabilities, business logic, or proprietary details. This exposure can lead to significant security implications including competitive disadvantage, regulatory compliance violations, and potential exploitation of additional system weaknesses that attackers might discover through the gathered intelligence. The vulnerability affects organizations that rely on Bugzilla for issue tracking and may have various teams or departments with different access levels, making the unauthorized data extraction particularly concerning.
Organizations affected by this vulnerability should implement immediate mitigations including upgrading to patched versions of Bugzilla where the access control checks have been properly implemented. The fix typically involves enhancing the get_attachment_link function to verify user permissions before displaying attachment descriptions in public contexts. Security administrators should also review existing comment structures to ensure that no sensitive information has been inadvertently exposed through public comments, and consider implementing additional monitoring for unusual access patterns or data extraction attempts. This vulnerability aligns with CWE-200, which addresses improper output sanitization, and maps to ATT&CK technique T1213, representing data from information repositories, demonstrating how attackers can leverage application-level flaws to extract sensitive data through seemingly benign user interfaces. The remediation process should include comprehensive testing to ensure that all attachment access controls function properly across different user roles and permission levels while maintaining system functionality for legitimate users.