Vulnerability Description
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 create a digitally signed ODF document, by manipulating the documentsignatures.xml or macrosignatures.xml stream within the document to combine multiple certificate data, which when opened caused LibreOffice to display a validly signed indicator but whose content was unrelated to the signature shown. This issue affects: The Document Foundation LibreOffice 7-0 versions prior to 7.0.6; 7-1 versions prior to 7.1.2.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libreoffice | Libreoffice | >= 7.0.0, < 7.0.6 |
| Debian | Debian Linux | 11.0 |
Related Weaknesses (CWE)
References
- https://www.debian.org/security/2021/dsa-4988Third Party Advisory
- https://www.libreoffice.org/about-us/security/advisories/CVE-2021-25633Vendor Advisory
- https://www.debian.org/security/2021/dsa-4988Third Party Advisory
- https://www.libreoffice.org/about-us/security/advisories/CVE-2021-25633Vendor Advisory
FAQ
What is CVE-2021-25633?
CVE-2021-25633 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 i...
How severe is CVE-2021-25633?
CVE-2021-25633 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-25633?
Check the references section above for vendor advisories and patch information. Affected products include: Libreoffice Libreoffice, Debian Debian Linux.