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CVE-2021-25633

Status Candidate

Overview

LibreOffice supports digital signatures of ODF documents and macros within documents, presenting visual aids that no alteration of the document occurred since the last signing and that the signature is valid. An Improper Certificate Validation vulnerability in LibreOffice allowed an attacker to 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. This issue affects: The Document Foundation LibreOffice 7-0 versions prior to 7.0.6; 7-1 versions prior to 7.1.2.

Related Files

Ubuntu Security Notice USN-5153-1
Posted Nov 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5153-1 - It was discovered that LibreOffice incorrectly handled digital signatures. An attacker could possibly use this issue to create a specially crafted document that would display a validly signed indicator, contrary to expectations.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2021-25633
MD5 | b9585b0c0d7bd47a8833f1fbc3d9ded2
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