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CVE-2023-23924

10.0 · CRITICAL

Dompdf is an HTML to PDF converter.

Published Feb 1, 2023CWE-551EPSS 3.57%

Overview

CVE-2023-23924 is a critical-severity vulnerability. It was published on February 1, 2023 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Dompdf is an HTML to PDF converter. The URI validation on dompdf 2.0.1 can be bypassed on SVG parsing by passing `<image>` tags with uppercase letters. This may lead to arbitrary object unserialize on PHP < 8, through the `phar` URL wrapper. An attacker can exploit the vulnerability to call arbitrary URL with arbitrary protocols, if they can provide a SVG file to dompdf. In PHP versions before 8.0.0, it leads to arbitrary unserialize, that will lead to the very least to an arbitrary file deletion and even remote code execution, depending on classes that are available.

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/dompdf/dompdf/commit/7558f07f693b2ac3266089f21051e6b78c6a0c85GitHubgithub.com/dompdf/dompdf/releases/tag/v2.0.2GitHubgithub.com/dompdf/dompdf/security/advisories/GHSA-3cw5-7cxw-v5qgGitHubgithub.com/dompdf/dompdf/commit/7558f07f693b2ac3266089f21051e6b78c6a0c85GitHubgithub.com/dompdf/dompdf/releases/tag/v2.0.2GitHubgithub.com/dompdf/dompdf/security/advisories/GHSA-3cw5-7cxw-v5qg

How CyberStrike helps

Frequently asked questions

What is CVE-2023-23924?

CVE-2023-23924 is a critical-severity vulnerability. It was published on February 1, 2023 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

How severe is CVE-2023-23924?

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-23924?

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-2023-23924?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-23924 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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