[USN-5153-1] LibreOffice vulnerabilities

Marc Deslauriers marc.deslauriers at canonical.com
Mon Nov 22 13:52:09 UTC 2021

Ubuntu Security Notice USN-5153-1
November 22, 2021

libreoffice vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS


LibreOffice could incorrectly validate document signatures.

Software Description:
- libreoffice: Office productivity suite


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

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
  libreoffice-core                1:6.4.7-0ubuntu0.20.04.2

In general, a standard system update will make all the necessary changes.

  CVE-2021-25633, CVE-2021-25634

Package Information:

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