Dompdf up to 2.0.3 SVG Document Parser memory leak

Summaryinfo

A vulnerability was found in Dompdf up to 2.0.3 and classified as problematic. Affected by this issue is some unknown functionality of the component SVG Document Parser. Executing a manipulation can lead to memory leak. This vulnerability is registered as CVE-2023-50262. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Dompdf up to 2.0.3. It has been declared as problematic. This vulnerability affects an unknown code of the component SVG Document Parser. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. CVE summarizes:

Dompdf is an HTML to PDF converter for PHP. When parsing SVG images Dompdf performs an initial validation to ensure that paths within the SVG are allowed. One of the validations is that the SVG document does not reference itself. However, prior to version 2.0.4, a recursive chained using two or more SVG documents is not correctly validated. Depending on the system configuration and attack pattern this could exhaust the memory available to the executing process and/or to the server itself. php-svg-lib, when run in isolation, does not support SVG references for `image` elements. However, when used in combination with Dompdf, php-svg-lib will process SVG images referenced by an `image` element. Dompdf currently includes validation to prevent self-referential `image` references, but a chained reference is not checked. A malicious actor may thus trigger infinite recursion by chaining references between two or more SVG images. When Dompdf parses a malicious payload, it will crash due after exceeding the allowed execution time or memory usage. An attacker sending multiple request to a system can potentially cause resource exhaustion to the point that the system is unable to handle incoming request. Version 2.0.4 contains a fix for this issue.

The weakness was published 12/13/2023 as GHSA-3qx2-6f78-w2j2. The advisory is available at github.com. This vulnerability was named CVE-2023-50262 since 12/05/2023. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 2.0.4 eliminates this vulnerability. Applying the patch 41cbac16f3cf56affa49f06e8dae66d0eac2b593 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• Dompdf

Version

• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3

License

• open-source

Website

• Product: https://github.com/dompdf/dompdf/

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CPE 2.2info

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