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Ubuntu 21.10 USN-5330-1 Critical: LibreOffice Document Flaw Exploited

ubuntu
Calendar Grey March 15, 2022
Dist Ubuntu Esm H88
A critical LibreOffice flaw on Ubuntu allows malicious users to forge document signatures. Please update your system immediately.
LibreOffice could incorrectly validate document signatures.

Summary

LibreOffice could incorrectly validate document signatures.

Software Description:

- libreoffice: Office productivity suite

Details:

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.

Topics%20covered

Topics Covered

security advisory Ubuntu critical flaw LibreOffice document validation

Update Instructions

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

Ubuntu 21.10:
  libreoffice-core                1:7.2.5-0ubuntu0.21.10.3

Ubuntu 20.04 LTS:
  libreoffice-core                1:6.4.7-0ubuntu0.20.04.4

Ubuntu 18.04 LTS:
  libreoffice-core                1:6.0.7-0ubuntu0.18.04.11

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

References

https://ubuntu.com/security/notices/USN-5330-1

CVE-2021-25636

Severity
critical
Lowest
Low
Medium
High
Critical

March 15, 2022

Topics%20covered

Topics Covered

security advisory Ubuntu critical flaw LibreOffice document validation

Package Information

https://launchpad.net/ubuntu/+source/libreoffice/1:7.2.5-0ubuntu0.21.10.3
https://launchpad.net/ubuntu/+source/libreoffice/1:6.4.7-0ubuntu0.20.04.4
https://launchpad.net/ubuntu/+source/libreoffice/1:6.0.7-0ubuntu0.18.04.11

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