National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-12331 Detail

Description

PHPOffice PhpSpreadsheet before 1.8.0 has an XXE issue. The XmlScanner decodes the sheet1.xml from an .xlsx to utf-8 if something else than UTF-8 is declared in the header. This was a security measurement to prevent CVE-2018-19277 but the fix is not sufficient. By double-encoding the the xml payload to utf-7 it is possible to bypass the check for the string ?<!ENTITY? and thus allowing for an xml external entity processing (XXE) attack.

Source:  MITRE

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: N/A
NVD score not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/PHPOffice/PhpSpreadsheet/blob/master/CHANGELOG.md#180---2019-07-01
https://herolab.usd.de/security-advisories/usd-2019-0046/

Weakness Enumeration

Quick Info

CVE Dictionary Entry:
CVE-2019-12331
NVD Published Date:
11/07/2019
NVD Last Modified:
11/07/2019