CVE-2018-11325 in Joomla
Summary
by MITRE
An issue was discovered in Joomla! Core before 3.8.8. The web install application would autofill password fields after either a form validation error or navigating to a previous install step, and display the plaintext password for the administrator account at the confirmation screen.
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Analysis
by VulDB Data Team • 03/14/2023
This vulnerability in Joomla! Core represents a critical security flaw that exposes sensitive authentication credentials during the installation process. The issue affects versions prior to 3.8.8 and specifically targets the web installation application's handling of password fields. When users encounter form validation errors or navigate backward through installation steps, the system inadvertently retains and displays plaintext passwords in visible fields. This behavior creates an immediate risk of credential exposure during what should be a secure configuration process. The vulnerability stems from improper input sanitization and field management during multi-step installation workflows, where the application fails to properly clear or obscure password data when returning to previous screens. The flaw directly violates security best practices for credential handling and demonstrates a lack of proper session state management during installation procedures.
The technical implementation of this vulnerability allows attackers to obtain administrator passwords through simple navigation interactions within the installation interface. When users encounter validation errors or move between installation steps, the application's password field handling mechanism retains the plaintext values in memory and displays them on subsequent screens. This behavior creates a window of opportunity for unauthorized access, particularly in shared or public computing environments where physical access to the installation system might be possible. The vulnerability operates at the application layer and affects the web-based installation process specifically, making it exploitable through standard web browser interactions without requiring advanced technical skills. The flaw constitutes a direct violation of secure coding principles and demonstrates poor input validation practices that should be addressed through proper field clearing mechanisms.
From an operational perspective, this vulnerability poses significant risks to organizations deploying Joomla installation, including the ability to modify content, add users, and potentially escalate privileges to system-level access. The vulnerability is particularly concerning because it occurs during the installation phase, when security awareness might be lower and the system is in a transitional state between initial setup and full operational deployment. This creates a window of opportunity for attackers to compromise the entire system before proper security measures can be implemented.
The remediation for this vulnerability requires immediate application of the Joomla installations are updated promptly, particularly before deploying new systems or upgrading existing ones. System administrators should also conduct thorough vulnerability assessments to identify any systems running affected versions of Joomla! Core and verify that the patch has been successfully applied. Additional security measures include implementing secure installation procedures that minimize exposure to unauthorized access during the installation phase, such as restricting physical access to installation systems and ensuring that installation processes occur in secure network environments. The vulnerability highlights the importance of proper session management and input sanitization in web applications, particularly during critical system configuration processes where sensitive data is handled. Organizations should also consider implementing automated security scanning tools that can detect vulnerable installations and alert administrators to potential exposure risks. This incident underscores the necessity of following secure coding practices and proper input validation to prevent credential exposure during system configuration processes, aligning with industry standards such as those defined in the CWE catalog under weaknesses related to credential handling and input validation.