PHPOffice PhpSpreadsheet up to 1.29.3/2.1.2/2.3.1/3.3.x scan/findCharSet xml external entity reference

Summaryinfo

A vulnerability was found in PHPOffice PhpSpreadsheet up to 1.29.3/2.1.2/2.3.1/3.3.x and classified as problematic. Affected by this issue is the function scan/findCharSet. Such manipulation leads to xml external entity reference. This vulnerability is traded as CVE-2024-47873. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in PHPOffice PhpSpreadsheet up to 1.29.3/2.1.2/2.3.1/3.3.x and classified as critical. Affected by this issue is the function scan/findCharSet. The manipulation with an unknown input leads to a xml external entity reference vulnerability. Using CWE to declare the problem leads to CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. Impacted is confidentiality, integrity, and availability. CVE summarizes:

PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. The XmlScanner class has a scan method which should prevent XXE attacks. However, prior to versions 1.9.4, 2.1.3, 2.3.2, and 3.4.0, the regexes used in the `scan` method and the findCharSet method can be bypassed by using UCS-4 and encoding guessing. An attacker can bypass the sanitizer and achieve an XML external entity attack. Versions 1.9.4, 2.1.3, 2.3.2, and 3.4.0 fix the issue.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2024-47873 since 10/04/2024. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

Upgrading to version 1.29.4, 2.1.3, 2.3.2 or 3.4.0 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• PHPOffice

Name

• PhpSpreadsheet

Version

• 1.29.0
• 1.29.1
• 1.29.2
• 1.29.3
• 2.1.0
• 2.1.1
• 2.1.2
• 2.3.0
• 2.3.1
• 3.0
• 3.1
• 3.2
• 3.3

Website

• Product: https://github.com/PHPOffice/PhpSpreadsheet/

CPE 2.3info

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CPE 2.2info

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