CVE-2019-9853
Insufficient URL decoding flaw in categorizing macro location
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
1Exploited in Wild
-Decision
Descriptions
LibreOffice documents can contain macros. The execution of those macros is controlled by the document security settings, typically execution of macros are blocked by default. A URL decoding flaw existed in how the urls to the macros within the document were processed and categorized, resulting in the possibility to construct a document where macro execution bypassed the security settings. The documents were correctly detected as containing macros, and prompted the user to their existence within the documents, but macros within the document were subsequently not controlled by the security settings allowing arbitrary macro execution This issue affects: LibreOffice 6.2 series versions prior to 6.2.7; LibreOffice 6.3 series versions prior to 6.3.1.
Los documentos de LibreOffice pueden contener macros. La ejecución de esas macros está controlada por la configuración de seguridad del documento, por lo general, la ejecución de las macros está bloqueada por defecto. Existía un defecto de decodificación de URL en cómo se procesaban y clasificaban las URL de las macros dentro del documento, resultando en la posibilidad de construir un documento donde la ejecución de macros omitiera la configuración de seguridad. Los documentos fueron detectados correctamente como que contenían macros e incitaron al usuario a su existencia dentro de los documentos, pero las macros dentro del documento no fueron controladas posteriormente por la configuración de seguridad lo que permitía la ejecución arbitraria de macros. Este problema afecta a: LibreOffice serie 6.2 versiones anteriores a 6.2.7 ; LibreOffice serie 6.3 versiones anteriores a 6.3.1.
LibreOffice is an open source, community-developed office productivity suite. It includes key desktop applications, such as a word processor, a spreadsheet, a presentation manager, a formula editor, and a drawing program. LibreOffice replaces OpenOffice and provides a similar but enhanced and extended office suite. Issues addressed include code execution and script execution vulnerabilities.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2019-03-17 CVE Reserved
- 2019-09-27 CVE Published
- 2020-02-21 First Exploit
- 2024-09-16 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-116: Improper Encoding or Escaping of Output
- CWE-838: Inappropriate Encoding for Output Context
CAPEC
References (20)
| URL | Date | SRC |
|---|---|---|
| https://packetstorm.news/files/id/156474 | 2020-02-21 |
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Libreoffice Search vendor "Libreoffice" | Libreoffice Search vendor "Libreoffice" for product "Libreoffice" | >= 6.2.0 < 6.2.6 Search vendor "Libreoffice" for product "Libreoffice" and version " >= 6.2.0 < 6.2.6" | - |
Affected
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| Libreoffice Search vendor "Libreoffice" | Libreoffice Search vendor "Libreoffice" for product "Libreoffice" | >= 6.3.0 < 6.3.1 Search vendor "Libreoffice" for product "Libreoffice" and version " >= 6.3.0 < 6.3.1" | - |
Affected
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