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CVE-2021-25633

Published: 11 October 2021

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.

Priority

Medium

CVSS 3 base score: 7.5

Status

Package Release Status
libreoffice
Launchpad, Ubuntu, Debian
Upstream
Released (7.0.6,7.1.2,1:7.2.0-2)
Ubuntu 21.10 (Impish Indri) Not vulnerable
(1:7.2.1-0ubuntu3)
Ubuntu 21.04 (Hirsute Hippo) Not vulnerable
(1:7.1.2~rc2-0ubuntu2)
Ubuntu 20.04 LTS (Focal Fossa)
Released (1:6.4.7-0ubuntu0.20.04.2)
Ubuntu 18.04 LTS (Bionic Beaver) Ignored

Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(code not present)
Ubuntu 14.04 ESM (Trusty Tahr) Ignored
(out of standard support)
Patches:
Upstream: https://github.com/LibreOffice/core/commit/ad5930e87e788780a255523f106deb1dde5d7b37 (bp)
Upstream: https://github.com/LibreOffice/core/commit/a1cf770c2d7ca3e153e0b1f01ddcc313bc2bed7f