CVE-2012-0466 in Bugzilla
Summary
by MITRE
template/en/default/list/list.js.tmpl in Bugzilla 2.x and 3.x before 3.6.9, 3.7.x and 4.0.x before 4.0.6, and 4.1.x and 4.2.x before 4.2.1 does not properly handle multiple logins, which allows remote attackers to conduct cross-site scripting (XSS) attacks and obtain sensitive bug information via a crafted web page.
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Analysis
by VulDB Data Team • 04/15/2017
The vulnerability identified as CVE-2012-0466 represents a critical cross-site scripting flaw within the Bugzilla bug tracking system that affects multiple version ranges spanning from 2.x through 4.2.x releases. This vulnerability specifically resides in the template file template/en/default/list/list.js.tmpl which handles the display of bug lists and related JavaScript functionality. The flaw manifests when the system fails to properly manage concurrent user sessions or multiple login scenarios, creating an exploitable condition that enables malicious actors to inject arbitrary JavaScript code into the application's response. The vulnerability is particularly concerning as it allows remote attackers to execute XSS attacks without requiring authentication, making it a significant threat to the confidentiality and integrity of the bug tracking environment.
The technical implementation of this vulnerability stems from inadequate input sanitization and session management within the Bugzilla template system. When multiple users attempt to access or interact with the bug list functionality simultaneously, the system fails to properly isolate user contexts, leading to potential cross-contamination of session data and JavaScript execution contexts. This improper handling of concurrent access creates a scenario where malicious JavaScript code injected by one user can be executed in the context of another user's session, effectively enabling session hijacking and data exfiltration. The flaw is classified under CWE-79 as a failure to sanitize user input in web applications, specifically manifesting as a cross-site scripting vulnerability that allows arbitrary code execution in victim browsers. The vulnerability directly impacts the application's ability to maintain proper user isolation and session boundaries, undermining fundamental security principles of web application design.
The operational impact of CVE-2012-0466 extends beyond simple XSS exploitation to encompass potential data breaches and unauthorized access to sensitive bug information. Attackers can leverage this vulnerability to execute malicious scripts that can steal session cookies, redirect users to phishing sites, or extract confidential bug reports and related information from the Bugzilla database. The vulnerability is particularly dangerous in environments where Bugzilla is used to track security vulnerabilities, feature requests, or other sensitive development information, as the XSS attack could potentially expose classified data or development artifacts. The attack vector requires only a crafted web page that triggers the vulnerable template functionality, making it easily exploitable through social engineering or by compromising web pages that embed links to vulnerable Bugzilla installations. This vulnerability effectively violates the principle of least privilege and can lead to complete compromise of the bug tracking system's integrity and confidentiality.
Organizations affected by this vulnerability should immediately implement the available patches and updates for their Bugzilla installations, particularly upgrading to versions 3.6.9, 4.0.6, 4.2.1, or later releases that contain the necessary fixes. The mitigation strategy should include comprehensive patch management procedures and regular security assessments of web applications. Additionally, implementing proper input validation and output encoding mechanisms within the application's template processing system can help prevent similar vulnerabilities from occurring in the future. Security monitoring should be enhanced to detect unusual patterns in user access and session management that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1059.007 for JavaScript execution and T1566 for credential access through social engineering, making it a significant concern for organizations following enterprise security frameworks. Organizations should also consider implementing web application firewalls and content security policies to provide additional defense-in-depth measures against similar cross-site scripting vulnerabilities that could be exploited through similar template or session management flaws.