Affected: AlmaLinux:8: autocorr-af, AlmaLinux:8: autocorr-bg, AlmaLinux:8: autocorr-ca, AlmaLinux:8: autocorr-cs, AlmaLinux:8: autocorr-da, AlmaLinux:8: autocorr-de, AlmaLinux:8: autocorr-en, AlmaLinux:8: autocorr-es, AlmaLinux:8: autocorr-fa, AlmaLinux:8: autocorr-fi and 161 more

LibreOffice is an open source, community-developed office productivity suite. It includes key desktop applications, such as a word processor, a spreadsheet, a presentation manager, a formula editor, and a drawing program. LibreOffice replaces OpenOffice and provides a similar but enhanced and extended office suite.

Security Fix(es):

* libreoffice: Content Manipulation with Double Certificate Attack (CVE-2021-25633)

* libreoffice: Timestamp Manipulation with Signature Wrapping (CVE-2021-25634)

* libreoffice: Content Manipulation with Certificate Validation Attack (CVE-2021-25635)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

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 modify a digitally signed ODF document to insert an additional signing time timestamp which LibreOffice would incorrectly present as a valid signature signed at the bogus signing time. This issue affects: The Document Foundation LibreOffice 7-0 versions prior to 7.0.6; 7-1 versions prior to 7.1.2.

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 modify a digitally signed ODF document to insert an additional signing time timestamp which LibreOffice would incorrectly present as a valid signature signed at the bogus signing time. This issue affects: The Document Foundation LibreOffice 7-0 versions prior to 7.0.6; 7-1 versions prior to 7.1.2.

libreoffice: Content Manipulation with Double Certificate Attack libreoffice: Timestamp Manipulation with Signature Wrapping libreoffice: Content Manipulation with Certificate Validation Attack

Affected: Ubuntu:20.04:LTS: libreoffice

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 modify a digitally signed ODF document to insert an additional signing time timestamp which LibreOffice would incorrectly present as a valid signature signed at the bogus signing time. This issue affects: The Document Foundation LibreOffice 7-0 versions prior to 7.0.6; 7-1 versions prior to 7.1.2.