Vulnerability in Libreoffice
CVE-2022-26305
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.
Vulnerability class: Improper Certificate Validation
EPSS: 0.011 (62.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Libreoffice
- The Document Foundation Libreoffice — versions 7.2, 7.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@documentfoundation.org (Vendor Advisory)
- security@documentfoundation.org (mailing-list)
Frequently asked questions
- What is CVE-2022-26305?
- CVE-2022-26305 is a high-severity vulnerability in Libreoffice, classified under Improper Certificate Validation. CVSS score: 7.5/10. Published 2022-07-25.
- How severe is CVE-2022-26305?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2022-26305 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.