Improper Certificate Validation Affecting libreoffice package, versions <1:6.4.7-0ubuntu0.20.04.5


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.23% (61st percentile)

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  • Snyk IDSNYK-UBUNTU2004-LIBREOFFICE-2961377
  • published28 Jul 2022
  • disclosed25 Jul 2022

Introduced: 25 Jul 2022

CVE-2022-26305  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 libreoffice to version 1:6.4.7-0ubuntu0.20.04.5 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libreoffice package and not the libreoffice package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

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.

CVSS Scores

version 3.1