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CVE-2022-26305

Published: 25 July 2022

An Improper Certificate Validation vulnerability in LibreOffice existed where determining if a macro was signed by a trusted author was done by only matching the serial number and issuer string of the used certificate with that of a trusted certificate. This is not sufficient to verify that the macro was actually signed with the certificate. An adversary could therefore create an arbitrary certificate with a serial number and an issuer string identical to a trusted certificate which LibreOffice would present as belonging to the trusted author, potentially leading to the user to execute arbitrary code contained in macros improperly trusted. This issue affects: The Document Foundation LibreOffice 7.2 versions prior to 7.2.7; 7.3 versions prior to 7.3.1.

Priority

Medium

CVSS 3 base score: 7.5

Status

Package Release Status
libreoffice
Launchpad, Ubuntu, Debian
bionic
Released (1:6.0.7-0ubuntu0.18.04.12)
focal
Released (1:6.4.7-0ubuntu0.20.04.5)
jammy Not vulnerable
(1:7.3.3-0ubuntu0.22.04.1)
kinetic Not vulnerable

trusty Ignored
(out of standard support)
upstream
Released (1:7.3.2~rc2-1)
xenial Needs triage

Patches:
upstream: https://github.com/LibreOffice/core/commit/a7aaa78acea4c1d51283c2fce54ff9f5339026f8 (7.2)
upstream: https://github.com/LibreOffice/core/commit/bae5503ac47ac2faa4c4365f86a00543e43a149a (7.2)
upstream: https://github.com/LibreOffice/core/commit/0ce93b38af84453aba8002c098ac168b0fadfc97 (6.4)
upstream: https://github.com/LibreOffice/core/commit/2c8c221b88f2e2bb5b29a6c1bcce1ea75e98136a (6.1)