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 contain both "X509Data" and "KeyValue" children of the "KeyInfo" tag, which when opened caused LibreOffice to verify using the "KeyValue" but to report verification with the unrelated "X509Data" value. This issue affects: The Document Foundation LibreOffice 7.2 versions prior to 7.2.5.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libreoffice | Libreoffice | >= 7.2.0, < 7.2.5 |
| Fedoraproject | Fedora | 34 |
Related Weaknesses (CWE)
References
- https://lists.debian.org/debian-lts-announce/2023/03/msg00022.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://www.libreoffice.org/about-us/security/advisories/CVE-2021-25636/Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/03/msg00022.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://www.libreoffice.org/about-us/security/advisories/CVE-2021-25636/Vendor Advisory
FAQ
What is CVE-2021-25636?
CVE-2021-25636 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-2021-25636?
CVE-2021-25636 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-2021-25636?
Check the references section above for vendor advisories and patch information. Affected products include: Libreoffice Libreoffice, Fedoraproject Fedora.