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CVE-2024-2408

5.9 · MEDIUM

The openssl_private_decrypt function in PHP, when using PKCS1 padding (OPENSSL_PKCS1_PADDING, which is the default), is vulnerable to the Marvin Attack unless it is used with an OpenSSL version tha…

Published Jun 9, 2024CWE-203EPSS 1.16%

Overview

CVE-2024-2408 is a medium-severity vulnerability. It was published on June 9, 2024 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The openssl_private_decrypt function in PHP, when using PKCS1 padding (OPENSSL_PKCS1_PADDING, which is the default), is vulnerable to the Marvin Attack unless it is used with an OpenSSL version that includes the changes from this pull request: https://github.com/openssl/openssl/pull/13817 (rsa_pkcs1_implicit_rejection). These changes are part of OpenSSL 3.2 and have also been backported to stable versions of various Linux distributions, as well as to the PHP builds provided for Windows since the previous release. All distributors and builders should ensure that this version is used to prevent PHP from being vulnerable.

PHP Windows builds for the versions 8.1.29, 8.2.20 and 8.3.8 and above include OpenSSL patches that fix the vulnerability.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/php/php-src/security/advisories/GHSA-hh26-4ppw-5864Reflists.fedoraproject.org/archives/list/[email protected]/message/PKGTQUOA2NTZ3RXN22CSAUJPIRUYRB4B/Reflists.fedoraproject.org/archives/list/[email protected]/message/W45DBOH56NQDRTOM2DN2LNA2FZIMC3PK/GitHubgithub.com/php/php-src/security/advisories/GHSA-hh26-4ppw-5864Reflists.fedoraproject.org/archives/list/[email protected]/message/PKGTQUOA2NTZ3RXN22CSAUJPIRUYRB4B/Reflists.fedoraproject.org/archives/list/[email protected]/message/W45DBOH56NQDRTOM2DN2LNA2FZIMC3PK/Refsecurity.netapp.com/advisory/ntap-20250321-0008/

How CyberStrike helps

Frequently asked questions

What is CVE-2024-2408?

CVE-2024-2408 is a medium-severity vulnerability. It was published on June 9, 2024 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2024-2408?

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-2408?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-2408?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-2408 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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