CVE-2021-25634
Published: 12 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 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.
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/abe77c4fcb9ea97d9fff07eaea6d8863bcba5b02 upstream: https://github.com/LibreOffice/core/commit/94ce59dd02fcfcaa1eb4f195b45a9a2edbd58242 |
||
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 |