CVE-2021-25633
Content Manipulation with Double Certificate Attack
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
LibreOffice soporta firmas digitales de documentos ODF y macros dentro de documentos, presentando ayudas visuales de que no se ha producido ninguna alteración del documento desde la última firma y que la firma es válida. Una vulnerabilidad de Comprobación Inapropiada de Certificados en LibreOffice permitía a un atacante crear un documento ODF firmado digitalmente, al manipular el flujo documentsignatures.xml o macrosignatures.xml dentro del documento para combinar múltiples datos de certificados, que cuando se abría causaba que LibreOffice mostrara un indicador firmado válidamente pero cuyo contenido no estaba relacionado con la firma mostrada. Este problema afecta a: versiones de LibreOffice 7-0 de The Document Foundation anteriores a la 7.0.6; versiones 7-1 anteriores a 7.1.2
LibreOffice improperly validated signatures which by manipulation of signatures xml files allowed for multiple certificate data to be combined and led to the ability to show content as validly signed even if it was not content related to the signature
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-01-19 CVE Reserved
- 2021-10-11 CVE Published
- 2024-08-19 EPSS Updated
- 2024-09-16 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-295: Improper Certificate Validation
CAPEC
References (4)
URL | Tag | Source |
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URL | Date | SRC |
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URL | Date | SRC |
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URL | Date | SRC |
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https://www.debian.org/security/2021/dsa-4988 | 2021-10-18 | |
https://www.libreoffice.org/about-us/security/advisories/CVE-2021-25633 | 2021-10-18 | |
https://access.redhat.com/security/cve/CVE-2021-25633 | 2022-05-10 | |
https://bugzilla.redhat.com/show_bug.cgi?id=2013135 | 2022-05-10 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
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Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Libreoffice Search vendor "Libreoffice" | Libreoffice Search vendor "Libreoffice" for product "Libreoffice" | >= 7.0.0 < 7.0.6 Search vendor "Libreoffice" for product "Libreoffice" and version " >= 7.0.0 < 7.0.6" | - |
Affected
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Libreoffice Search vendor "Libreoffice" | Libreoffice Search vendor "Libreoffice" for product "Libreoffice" | >= 7.1.0 < 7.1.2 Search vendor "Libreoffice" for product "Libreoffice" and version " >= 7.1.0 < 7.1.2" | - |
Affected
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Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0" | - |
Affected
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