CVE-2021-25635: Content Manipulation with Certificate Validation Attack
An Improper Certificate Validation vulnerability in LibreOffice allowed an attacker to self sign an ODF document, with a signature untrusted by the target, then modify it to change the signature algorithm to an invalid (or unknown to LibreOffice) algorithm and LibreOffice would incorrectly present such a signature with an unknown algorithm as a valid signature issued by a trusted person This issue affects LibreOffice: from 7.0 before 7.0.5, from 7.1 before 7.1.1.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2021-25635?
CVE-2021-25635 has been classified as a high-severity vulnerability due to its potential impact on document integrity.
How do I fix CVE-2021-25635?
To fix CVE-2021-25635, you should update LibreOffice to version 7.0.6 or later, or 7.1.2 or later.
What does CVE-2021-25635 affect?
CVE-2021-25635 affects LibreOffice versions 7.0 to 7.0.5 and 7.1 to 7.1.1.
What type of vulnerability is CVE-2021-25635?
CVE-2021-25635 is an Improper Certificate Validation vulnerability that enables attackers to manipulate digital signatures.
What can an attacker do with CVE-2021-25635?
An attacker can exploit CVE-2021-25635 to create a self-signed ODF document and alter its signature algorithm, compromising document authenticity.