CVE-2011-5024 in Mailman
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in mmsearch/design in the Mailman/htdig integration patch for Mailman allows remote attackers to inject arbitrary web script or HTML via the config parameter.
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Analysis
by VulDB Data Team • 02/13/2019
The CVE-2011-5024 vulnerability represents a critical cross-site scripting flaw within the Mailman mailing list management system, specifically in the mmsearch/design component of the Mailman/htdig integration patch. This vulnerability arises from inadequate input validation and sanitization mechanisms that fail to properly process user-supplied data, creating an avenue for malicious actors to execute arbitrary web scripts within the context of legitimate user sessions. The flaw is particularly concerning as it affects the integration between Mailman and htdig search functionality, which is commonly deployed in enterprise and organizational email environments where user trust and data integrity are paramount.
The technical exploitation of this vulnerability occurs through manipulation of the config parameter within the mmsearch/design module, allowing remote attackers to inject malicious HTML content or JavaScript code. When the vulnerable system processes this malformed input without proper sanitization, the injected code becomes executable within the browser context of authenticated users who access the affected interface. This type of vulnerability falls under CWE-79, which specifically addresses cross-site scripting flaws in web applications, and aligns with ATT&CK technique T1566.001 for initial access through malicious web content. The vulnerability exists because the system does not properly escape or filter special characters in the config parameter, enabling attackers to bypass security controls that would normally prevent script execution.
The operational impact of CVE-2011-5024 extends beyond simple data theft or defacement, as successful exploitation can lead to complete session hijacking, privilege escalation, and persistent backdoor establishment within the affected environment. An attacker could leverage this vulnerability to steal cookies, modify user permissions, or redirect victims to malicious sites that appear legitimate. The attack surface is particularly broad since Mailman installations are commonly found in corporate networks where administrators and users frequently interact with web-based interfaces, making the exploitation potential significant for organizations that rely on mailing list management systems. This vulnerability demonstrates a fundamental weakness in the input handling architecture of the integration patch, where the developers failed to implement proper security controls during the integration process.
Mitigation strategies for CVE-2011-5024 should prioritize immediate patch application from the Mailman development team or vendor-specific updates that address the input validation gaps in the mmsearch/design component. Organizations should implement comprehensive input sanitization measures that properly escape special characters and validate all user-supplied parameters before processing. Network-level protections such as web application firewalls and content security policies can provide additional defense-in-depth layers to prevent exploitation attempts. The implementation of proper output encoding and the adoption of secure coding practices that follow OWASP secure coding guidelines would significantly reduce the risk of similar vulnerabilities. Additionally, regular security assessments and penetration testing of web applications should include thorough examination of integration points between different software components to identify potential XSS attack vectors that may not be immediately apparent during initial development phases.