PHPOffice PhpSpreadsheet up to 1.29.1/2.1.0 XLSX File setEmbedImages absolute path traversal

Summaryinfo

A vulnerability marked as problematic has been reported in PHPOffice PhpSpreadsheet up to 1.29.1/2.1.0. Affected by this vulnerability is the function setEmbedImages of the component XLSX File Handler. The manipulation leads to absolute path traversal. This vulnerability is documented as CVE-2024-45291. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in PHPOffice PhpSpreadsheet up to 1.29.1/2.1.0. It has been rated as problematic. This issue affects the function setEmbedImages of the component XLSX File Handler. The manipulation with an unknown input leads to a absolute path traversal vulnerability. Using CWE to declare the problem leads to CWE-36. The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize absolute path sequences such as "/abs/path" that can resolve to a location that is outside of that directory. Impacted is confidentiality. The summary by CVE is:

PHPSpreadsheet is a pure PHP library for reading and writing spreadsheet files. It's possible for an attacker to construct an XLSX file that links images from arbitrary paths. When embedding images has been enabled in HTML writer with `$writer->setEmbedImages(true);` those files will be included in the output as `data:` URLs, regardless of the file's type. Also URLs can be used for embedding, resulting in a Server-Side Request Forgery vulnerability. When embedding images has been enabled, an attacker can read arbitrary files on the server and perform arbitrary HTTP GET requests. Note that any PHP protocol wrappers can be used, meaning that if for example the `expect://` wrapper is enabled, also remote code execution is possible. This issue has been addressed in release versions 1.29.2, 2.1.1, and 2.3.0. All users are advised to upgrade. there are no known workarounds for this vulnerability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2024-45291 since 08/26/2024. The exploitation is known to be difficult. The attack may be initiated remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 1.29.2, 2.1.1 or 2.3.0 eliminates this vulnerability.

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Productinfo

Vendor

• PHPOffice

Name

• PhpSpreadsheet

Version

• 1.29.0
• 1.29.1
• 2.0
• 2.1.0

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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