CVE-2024-56521: TCPDF Package Suffers from Insecure Certificate Validation
Summary
CVE-2024-56521: TCPDF missing certificate validation. Affects tecnickcom/tcpdf versions < 6.8.0. Fixed in 6.8.0. How to fix ↓
Also tracked for
- tcpdf · Debian:11
The same CVE-2024-56521 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
TCPDF is a popular open-source PHP library used for generating PDF documents. It provides a wide range of features including support for various image formats, text rendering, and advanced layout options. However, prior to version 6.8.0, TCPDF had a vulnerability related to SSL certificate validation when using libcurl, which could expose applications to security risks.
Vulnerability Detail
The vulnerability arises from the improper configuration of SSL certificate verification settings in TCPDF when using libcurl. Specifically, the options CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER are not set securely, allowing potential man-in-the-middle attacks. This could lead to sensitive data being intercepted or manipulated during transmission, posing a significant risk to applications relying on secure connections.
How To Fix
Minimum fixed version
6.8.0
This is the first release that contains the fix.
composer require tecnickcom/tcpdf:6.8.0Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not feasible, a temporary workaround is to manually configure the SSL options in your application to ensure that certificate verification is enforced. This can be done by setting the following options in your curl request:
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
Conclusion
The TCPDF package has a significant vulnerability (CVE-2024-56521) related to insecure SSL certificate validation. It is crucial for developers using this library to update to version 6.8.0 or later to mitigate potential security risks. Implementing the recommended fixes and workarounds will help protect applications from exploitation.
See every vulnerability recorded for tecnickcom/tcpdf →
FAQ
CVE-2024-56521 is a vulnerability in the TCPDF package that involves insecure SSL certificate validation when using libcurl.
If your application uses TCPDF versions prior to 6.8.0 and relies on libcurl for secure connections, it may be susceptible to man-in-the-middle attacks.
You can implement a workaround by ensuring that SSL certificate verification is enforced in your curl settings.
You can visit the official TCPDF GitHub repository or its documentation for more details on its features and usage.
Vulert provides real-time monitoring and alerts for open-source vulnerabilities using your composer.lock file, allowing you to stay informed about potential risks in your software.
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