CVE-2022-26305
Publication date 25 July 2022
Last updated 25 August 2025
Ubuntu priority
Description
An Improper Certificate Validation vulnerability in LibreOffice existed where determining if a macro was signed by a trusted author was done by only matching the serial number and issuer string of the used certificate with that of a trusted certificate. This is not sufficient to verify that the macro was actually signed with the certificate. An adversary could therefore create an arbitrary certificate with a serial number and an issuer string identical to a trusted certificate which LibreOffice would present as belonging to the trusted author, potentially leading to the user to execute arbitrary code contained in macros improperly trusted. This issue affects: The Document Foundation LibreOffice 7.2 versions prior to 7.2.7; 7.3 versions prior to 7.3.1.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libreoffice | ||
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Fixed 1:6.4.7-0ubuntu0.20.04.5
|
|
| 18.04 LTS bionic |
Fixed 1:6.0.7-0ubuntu0.18.04.12
|
|
| 16.04 LTS xenial | Ignored end of standard support | |
| 14.04 LTS trusty | Ignored end of standard support |
Patch details
| Package | Patch details |
|---|---|
| libreoffice |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-5661-1
- LibreOffice vulnerabilities
- 6 October 2022
- USN-5694-1
- LibreOffice vulnerabilities
- 20 October 2022