Vulnerability in Libreoffice
CVE-2021-25634
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.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (51.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Libreoffice
- The Document Foundation Libreoffice — versions 7-0, 7-1
- Debian Linux — versions 11.0
Weakness classification (CWE)
References
- www.libreoffice.org/about-us/security/advisories/CVE-2021-25634 (Vendor Advisory)
- www.debian.org/security/2021/dsa-4988 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-25634?
- CVE-2021-25634 is a high-severity vulnerability in Libreoffice, classified under Improper Certificate Validation. CVSS score: 7.5/10. Published 2021-10-12.
- How severe is CVE-2021-25634?
- High severity. CVSS v3 base score is 7.5 out of 10.