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

Summaryinfo

A vulnerability identified as problematic has been detected in PHPOffice PhpSpreadsheet up to 1.29.3/2.1.2/2.3.1/3.3.x. The affected element is an unknown function. This manipulation causes xml external entity reference. The identification of this vulnerability is CVE-2024-48917. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in PHPOffice PhpSpreadsheet up to 1.29.3/2.1.2/2.3.1/3.3.x. Affected by this vulnerability is some unknown functionality. The manipulation with an unknown input leads to a xml external entity reference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. The `XmlScanner` class has a scan method which should prevent XXE attacks. However, in a bypass of the previously reported `CVE-2024-47873`, the regexes from the `findCharSet` method, which is used for determining the current encoding can be bypassed by using a payload in the encoding UTF-7, and adding at end of the file a comment with the value `encoding="UTF-8"` with `"`, which is matched by the first regex, so that `encoding='UTF-7'` with single quotes `'` in the XML header is not matched by the second regex. 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 at github.com. This vulnerability is known as CVE-2024-48917 since 10/10/2024. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

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

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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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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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