CVE-2018-0618 in Mailman
Summary
by MITRE
Cross-site scripting vulnerability in Mailman 2.1.26 and earlier allows remote authenticated attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 04/27/2023
The vulnerability identified as CVE-2018-0618 represents a critical cross-site scripting flaw within the Mailman mailing list management system affecting versions 2.1.26 and earlier. This vulnerability resides in the web interface component of Mailman and specifically impacts authenticated users who possess valid credentials to access the system. The flaw allows malicious actors with accounts in the mailing list management system to execute arbitrary script code within the context of other users' browsers, potentially leading to unauthorized access to sensitive information or system compromise. The vulnerability is classified under CWE-79 as a failure to sanitize user input, specifically in the context of web application security where improper validation of user-supplied data leads to execution of malicious scripts.
The technical exploitation of this vulnerability occurs through unspecified vectors within the Mailman web interface, which likely involves the processing of user-provided content in list names, member information, or administrative parameters. Attackers can leverage their authenticated access to craft malicious input that, when processed by the application, gets executed in the browsers of other users who view the affected content. This type of vulnerability falls under the ATT&CK framework category of Web Application Attack Techniques, specifically targeting the execution of malicious scripts through user interface elements. The vulnerability demonstrates a classic case of insufficient input validation where user-supplied data flows directly into the web response without proper sanitization or encoding, creating a persistent XSS attack surface.
The operational impact of CVE-2018-0618 extends beyond simple script injection, as authenticated attackers can potentially escalate their privileges or access sensitive mailing list data, member information, and administrative functions. When exploited, this vulnerability could enable attackers to steal session cookies, perform actions on behalf of legitimate users, or gain access to private mailing list communications. The vulnerability particularly affects organizations relying on Mailman for email distribution lists, where member data and communication privacy are paramount. The risk is amplified by the fact that attackers only need authenticated access rather than being anonymous external parties, making this a significant concern for organizations where user access controls are not properly enforced.
Mitigation strategies for this vulnerability include immediate patching of Mailman installations to versions 2.1.27 or later, which contain the necessary security fixes. Organizations should implement comprehensive input validation and output encoding mechanisms throughout the application's web interface to prevent similar issues in the future. Security measures should include regular security audits of web applications, implementation of Content Security Policy headers, and strict enforcement of access controls to limit user privileges. Additionally, organizations should consider deploying web application firewalls and monitoring for suspicious user activities that might indicate exploitation attempts. The vulnerability highlights the importance of maintaining up-to-date software components and implementing defense-in-depth strategies to protect against persistent cross-site scripting attacks that can compromise user sessions and data integrity.