CVE-2003-1599 in WordPress
Summary
by MITRE
PHP remote file inclusion vulnerability in wp-links/links.all.php in WordPress 0.70 allows remote attackers to execute arbitrary PHP code via a URL in the $abspath variable.
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Analysis
by VulDB Data Team • 04/03/2022
The vulnerability described in CVE-2003-1599 represents a critical remote file inclusion flaw that affected early versions of the WordPress content management system. This vulnerability specifically targeted WordPress version 0.70 and resided within the wp-links/links.all.php file, making it a significant security risk for web applications utilizing this software. The flaw allowed malicious actors to inject and execute arbitrary PHP code on vulnerable systems, fundamentally compromising the integrity and security of affected websites.
The technical implementation of this vulnerability stems from improper input validation and dynamic variable handling within the WordPress codebase. Attackers could manipulate the $abspath variable through a URL parameter, which was then processed without adequate sanitization or validation checks. This oversight created an exploitable path where remote attackers could inject malicious file paths that would be included and executed by the PHP interpreter. The vulnerability directly aligns with CWE-98, which describes improper file inclusion vulnerabilities where attacker-controllable input is used to determine which files to include in a program. This weakness enables attackers to execute arbitrary code by manipulating the file inclusion mechanism.
The operational impact of CVE-2003-1599 was severe and far-reaching for affected WordPress installations. Successful exploitation could lead to complete system compromise, allowing attackers to execute commands on the web server, access sensitive data, modify website content, or establish persistent backdoors. The vulnerability particularly affected organizations that had not yet implemented proper security hardening measures or kept their WordPress installations up to date. Given that WordPress 0.70 was an early version of the platform, many installations likely lacked the security controls that would have mitigated such attacks, making the impact more widespread across the web application ecosystem.
Mitigation strategies for this vulnerability required immediate action from system administrators and developers. The most effective approach was to upgrade to a patched version of WordPress that addressed the file inclusion flaw in the wp-links/links.all.php file. Additionally, administrators should have implemented input validation measures, restricted file inclusion capabilities, and configured proper access controls for WordPress files. Security professionals could have employed web application firewalls to detect and block malicious inclusion attempts, while also implementing proper server configuration practices that limit the execution of remote files. The vulnerability's exploitation pattern aligns with ATT&CK technique T1190, which covers exploiting vulnerabilities in web applications to execute arbitrary code, emphasizing the need for comprehensive vulnerability management and patching processes across web applications. Organizations should have also implemented monitoring and logging mechanisms to detect unauthorized file inclusion attempts and maintain regular security assessments to identify similar vulnerabilities in their web applications.