CVE-2024-13636
Summary
The Brooklyn theme for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.9.9.2 via deserialization of untrusted input in the ot_decode function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
Severity
- Base Score: 8.8
- Exploitability Score: 2.8
- Impact Score: 5.9
- Exploitable: 0
Details
CVE-2024-13636 details a PHP Object Injection vulnerability within the Brooklyn theme for WordPress, affecting versions up to 4.9.9.2. The vulnerability lies in the ot_decode function, which deserializes untrusted input, allowing authenticated attackers with Subscriber-level access or higher to inject arbitrary PHP objects. While the Brooklyn theme itself doesn’t contain a readily exploitable POP chain, the presence of such a chain in other installed plugins or themes could be leveraged to achieve remote code execution, arbitrary file deletion, or sensitive data disclosure. The base score is 8.8, which indicates it is a high severity vulnerability. Exploitability score of 2.8 suggests that it is not easily exploitable. However, with the help of a properly crafted POP chain, the impact score of 5.9 can allow attackers to potentially delete arbitrary files, retrieve sensitive data, or execute code.
Remediation
- Update the Brooklyn Theme: The primary remediation is to update the Brooklyn theme to a version that addresses this vulnerability. Check the theme developer’s website or the WordPress theme repository for available updates. If an updated version is not available, consider switching to a different, actively maintained theme.
- Disable the Brooklyn Theme: If updating is not immediately possible, consider temporarily disabling the Brooklyn theme. This will prevent the vulnerability from being exploited until a patch or update is available.
- Monitor for Suspicious Activity: Closely monitor your WordPress installation for any unusual activity, such as unauthorized file modifications, unexpected database changes, or suspicious user logins.
- Review Installed Plugins and Themes: Conduct a thorough review of all installed WordPress plugins and themes. Identify and remove any plugins or themes that are no longer needed or are known to contain security vulnerabilities. Specifically, be wary of plugins/themes that have deserialization vulnerabilities.
- Implement Web Application Firewall (WAF): Deploy a Web Application Firewall (WAF) with rules to detect and prevent PHP Object Injection attacks. This can provide an additional layer of protection against potential exploitation.
- Limit User Privileges: Adhere to the principle of least privilege. Grant users only the minimum level of access required to perform their tasks. Avoid granting Subscriber-level access to users who do not need it.
- Regular Security Audits: Conduct regular security audits of your WordPress installation, including vulnerability scanning and penetration testing, to identify and address potential security weaknesses.
Assigner
- Name: Wordfence
- Email: [email protected]
Date
- Published Date: 2024-01-26 10:15:01
- Updated Date: 2024-01-26 10:15:01