CVE-2024-33103 in DokuWiki
Summary
by MITRE • 04/30/2024
An arbitrary file upload vulnerability in the Media Manager component of DokuWiki 2024-02-06a allows attackers to execute arbitrary code via uploading a crafted SVG file.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 08/23/2024
The vulnerability identified as CVE-2024-33103 represents a critical arbitrary file upload flaw within the Media Manager component of DokuWiki version 2024-02-06a. This issue stems from inadequate input validation and sanitization mechanisms that fail to properly inspect uploaded files before processing them within the web application environment. The vulnerability specifically targets the handling of SVG (Scalable Vector Graphics) files, which are commonly used for web graphics and typically considered safe due to their XML-based structure. However, the implementation in this version of DokuWiki does not sufficiently validate the content of these files, creating an opportunity for malicious actors to exploit the system.
The technical nature of this vulnerability aligns with CWE-434, which describes the weakness of allowing untrusted data to be uploaded to a web server without proper validation. When an attacker uploads a crafted SVG file, the application processes this file without adequate sanitization, potentially allowing malicious code execution. The SVG format's ability to embed JavaScript through various elements such as script tags, event handlers, or external references creates a vector for code injection attacks. This vulnerability can be leveraged to execute arbitrary commands on the affected server, potentially leading to full system compromise. The attack surface is particularly concerning as SVG files are frequently used in web applications and are often treated with less scrutiny than other file types.
The operational impact of this vulnerability extends beyond simple code execution, as it can enable attackers to gain persistent access to the affected system. An attacker who successfully exploits this vulnerability can upload malicious payloads that may include web shells, backdoors, or other malicious code that can be executed with the privileges of the web server process. This can lead to data exfiltration, system compromise, and potential lateral movement within the network. The vulnerability affects the integrity and confidentiality of the DokuWiki instance, potentially exposing sensitive documentation and user data. The attack requires minimal privileges as the vulnerability exists within the Media Manager component, which is typically accessible to authenticated users, making the exploitation more feasible in environments where user access is not strictly controlled.
Mitigation strategies for CVE-2024-33103 should focus on immediate patching of the affected DokuWiki version to the latest stable release that addresses this vulnerability. Organizations should also implement additional security controls such as strict file type validation, content inspection of uploaded files, and restriction of file upload capabilities to trusted users only. The implementation of web application firewalls and security monitoring systems can help detect and prevent exploitation attempts. According to ATT&CK framework, this vulnerability maps to T1190 (Exploit Public-Facing Application) and T1059 (Command and Scripting Interpreter), highlighting the need for comprehensive defensive measures. Organizations should also conduct regular security assessments and ensure proper access controls are in place to minimize the risk of unauthorized file uploads. The vulnerability demonstrates the importance of input validation and the principle of least privilege in web application security, particularly when handling user-uploaded content.