What is the CVSS score of CVE-2023-24813?

CVE-2023-24813 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 2.5%.

Is there a public PoC exploit available for CVE-2023-24813?

Yes, a public proof-of-concept exploit is available for CVE-2023-24813. Prioritise patching immediately. EPSS: 2.5%.

Is there a patch available for CVE-2023-24813?

Yes, a patch is available for CVE-2023-24813. Update the affected software to the latest version immediately.

PHP CVE-2023-24813

CRITICAL

Interpretation Conflict (CWE-436)

2023-02-07 security-advisories@github.com

RCE PHP Deserialization Dompdf

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Feb 07, 2023 - 19:15 nvd

CRITICAL 9.8

DescriptionNVD

Dompdf is an HTML to PDF converter written in php. Due to the difference in the attribute parser of Dompdf and php-svg-lib, an attacker can still call arbitrary URLs with arbitrary protocols. Dompdf parses the href attribute of image tags and respects xlink:href even if href is specified. However, php-svg-lib, which is later used to parse the svg file, parses the href attribute. Since href is respected if both xlink:href and href is specified, it's possible to bypass the protection on the Dompdf side by providing an empty xlink:href attribute. An attacker can exploit the vulnerability to call arbitrary URLs with arbitrary protocols if they provide an SVG file to the Dompdf. In PHP versions before 8.0.0, it leads to arbitrary unserialize, which will lead, at the very least, to arbitrary file deletion and might lead to remote code execution, depending on available classes. This vulnerability has been addressed in commit 95009ea98 which has been included in release version 2.0.3. Users are advised to upgrade. There are no known workarounds for this vulnerability.

AnalysisAI

Dompdf is an HTML to PDF converter written in php. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-436. Dompdf is an HTML to PDF converter written in php. Due to the difference in the attribute parser of Dompdf and php-svg-lib, an attacker can still call arbitrary URLs with arbitrary protocols. Dompdf parses the href attribute of image tags and respects xlink:href even if href is specified. However, php-svg-lib, which is later used to parse the svg file, parses the href attribute. Since href is respected if both xlink:href and href is specified, it's possible to bypass the protection on the Dompdf side by providing an empty xlink:href attribute. An attacker can exploit the vulnerability to call arbitrary URLs with arbitrary protocols if they provide an SVG file to the Dompdf. In PHP versions before 8.0.0, it leads to arbitrary unserialize, which will lead, at the very least, to arbitrary file deletion and might lead to remote code execution, depending on available classes. This vulnerability has been addressed in commit 95009ea98 which has been included in release version 2.0.3. Users are advised to upgrade. There are no known workarounds for this vulnerability. Affected products include: Dompdf Project Dompdf. Version information: before 8.0.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.