CVE-2021-25633
Published: 11 October 2021
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 create a digitally signed ODF document, by manipulating the documentsignatures.xml or macrosignatures.xml stream within the document to combine multiple certificate data, which when opened caused LibreOffice to display a validly signed indicator but whose content was unrelated to the signature shown. This issue affects: The Document Foundation LibreOffice 7-0 versions prior to 7.0.6; 7-1 versions prior to 7.1.2.
Notes
Author | Note |
---|---|
mdeslaur | The code changes required to fix this issue in Ubuntu 18.04 LTS are extensive. We will not be fixing this issue in Ubuntu 18.04 LTS. |
Priority
Status
Package | Release | Status |
---|---|---|
libreoffice Launchpad, Ubuntu, Debian |
bionic |
Ignored
|
focal |
Released
(1:6.4.7-0ubuntu0.20.04.2)
|
|
hirsute |
Not vulnerable
(1:7.1.2~rc2-0ubuntu2)
|
|
impish |
Not vulnerable
(1:7.2.1-0ubuntu3)
|
|
jammy |
Not vulnerable
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Released
(7.0.6,7.1.2,1:7.2.0-2)
|
|
xenial |
Ignored
(end of standard support)
|
|
Patches: upstream: https://github.com/LibreOffice/core/commit/ad5930e87e788780a255523f106deb1dde5d7b37 upstream: https://github.com/LibreOffice/core/commit/a1cf770c2d7ca3e153e0b1f01ddcc313bc2bed7f |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | High |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |