CVE-2014-2224 in Plogger
Summary
by MITRE
Plogger 1.0 RC1 and earlier, when the Lucid theme is used, does not assign new values for certain codes, which makes it easier for remote attackers to bypass the CAPTCHA protection mechanism via a series of form submissions.
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Analysis
by VulDB Data Team • 04/08/2018
The vulnerability identified as CVE-2014-2224 affects Plogger 1.0 RC1 and earlier versions when utilizing the Lucid theme, representing a significant weakness in the application's CAPTCHA implementation that directly impacts authentication security measures. This flaw resides in the theme's handling of certain code values during form processing, creating a predictable pattern that attackers can exploit to circumvent the intended security protection. The vulnerability specifically targets the CAPTCHA mechanism designed to prevent automated submissions and unauthorized access to the blogging platform's administrative functions.
The technical implementation flaw occurs within the Lucid theme's code generation and validation processes where specific code values are not properly regenerated or validated between successive form submissions. This allows attackers to submit multiple forms with the same CAPTCHA values, effectively bypassing the security checkpoint that should require unique verification codes for each submission attempt. The vulnerability stems from inadequate session management and code rotation mechanisms that should ensure fresh CAPTCHA values are generated for each interactive session. According to CWE-326, this represents a weakness in the cryptographic protection of sensitive data, specifically in the implementation of authentication mechanisms where the entropy and uniqueness of verification codes are compromised.
The operational impact of this vulnerability extends beyond simple bypass capabilities, as it enables attackers to perform automated form submissions and potentially gain unauthorized administrative access to the blogging platform. Remote attackers can systematically exploit this weakness to submit comments, create posts, or access restricted administrative functions without proper authentication. The vulnerability creates a persistent security risk that remains active as long as the affected Plogger version is deployed with the Lucid theme, making it particularly dangerous for websites that rely on CAPTCHA for protecting against spam and unauthorized access. This weakness aligns with ATT&CK technique T1110.003, which describes credential stuffing and brute force attacks that exploit predictable patterns in authentication mechanisms.
Mitigation strategies for CVE-2014-2224 require immediate action to either update to a patched version of Plogger or modify the Lucid theme's code implementation to ensure proper code regeneration between form submissions. The most effective solution involves implementing robust session management that generates unique CAPTCHA values for each submission attempt while maintaining proper validation mechanisms. Organizations should also consider implementing additional security layers such as rate limiting and IP address monitoring to detect and prevent automated attack patterns. The vulnerability highlights the importance of proper code review and security testing of themes and plugins, particularly those that interact with authentication and verification mechanisms. System administrators should also implement monitoring to detect unusual submission patterns that may indicate exploitation attempts. Given the nature of the vulnerability, this represents a critical security concern that requires immediate remediation to prevent potential unauthorized access to sensitive administrative functions and user data within the blogging platform.