#VU57214 Improper Certificate Validation in LibreOffice - CVE-2021-25633
Published: October 11, 2021
Vulnerability identifier: #VU57214
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-25633
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
LibreOffice
LibreOffice
Software vendor:
LibreOffice
LibreOffice
Description
The vulnerability allows a remote user to perform spoofing attack.
The vulnerability exists due to application does not properly check for digital signatures of ODF files. A remote attacker can create a digitally signed ODF document, by manipulating the documentsignatures.xml or macrosignatures.xml stream within the document to combine multiple certificate data, which when opened caused LibreOffice to display a validly signed indicator but whose content was unrelated to the signature shown.
Remediation
Install updates from vendor's website.