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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.11%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.11% probability · 64th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- libreoffice/libreoffice
- Source
- security@documentfoundation.org
References
- https://lists.debian.org/debian-lts-announce/2023/03/msg00022.html
- https://www.libreoffice.org/about-us/security/advisories/cve-2022-26305Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/03/msg00022.html
- https://www.libreoffice.org/about-us/security/advisories/cve-2022-26305Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.