CVE-2019-9854
Unsafe URL assembly flaw in allowed script location check
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
LibreOffice has a feature where documents can specify that pre-installed macros can be executed on various script events such as mouse-over, document-open etc. Access is intended to be restricted to scripts under the share/Scripts/python, user/Scripts/python sub-directories of the LibreOffice install. Protection was added, to address CVE-2019-9852, to avoid a directory traversal attack where scripts in arbitrary locations on the file system could be executed by employing a URL encoding attack to defeat the path verification step. However this protection could be bypassed by taking advantage of a flaw in how LibreOffice assembled the final script URL location directly from components of the passed in path as opposed to solely from the sanitized output of the path verification step. This issue affects: Document Foundation LibreOffice 6.2 versions prior to 6.2.7; 6.3 versions prior to 6.3.1.
LibreOffice presenta una funcionalidad en la que los documentos pueden especificar que las macros preinstaladas puedan ser ejecutadas sobre varios eventos de script, tales como mouse-over, document-open, etc. El acceso está previsto a restringirse para scripts bajo los subdirectorios share/Scripts/python, user/Scripts/python de la instalación de LibreOffice. La protección fue agregada, para abordar el CVE-2019-9852, para evitar un ataque de salto de directorio donde puedan ser ejecutados scripts en ubicaciones arbitrarias sobre el sistema de archivos mediante el empleo de un ataque de codificación de la URL para vencer el paso de comprobación de ruta. Sin embargo, esta protección podría ser omitida tomando ventaja de un fallo en la manera en que LibreOffice ensambló la ubicación final de la URL del script directamente desde los componentes de la ruta pasada en lugar de únicamente desde la salida saneada del paso de comprobación de ruta. Este problema afecta a: Document Foundation LibreOffice versiones 6.2 anteriores a 6.2.7; versiones 6.3 anteriores a 6.3.1.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2019-03-17 CVE Reserved
- 2019-09-06 CVE Published
- 2024-08-30 EPSS Updated
- 2024-09-16 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
- CWE-284: Improper Access Control
CAPEC
References (10)
URL | Tag | Source |
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https://lists.debian.org/debian-lts-announce/2019/10/msg00005.html | Mailing List | |
https://seclists.org/bugtraq/2019/Sep/17 | Mailing List |
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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" | >= 6.2.0 < 6.2.7 Search vendor "Libreoffice" for product "Libreoffice" and version " >= 6.2.0 < 6.2.7" | - |
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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Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04" | lts |
Affected
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Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04" | lts |
Affected
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Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 19.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.04" | - |
Affected
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Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0" | - |
Affected
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Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
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Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
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Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 29 Search vendor "Fedoraproject" for product "Fedora" and version "29" | - |
Affected
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Opensuse Search vendor "Opensuse" | Leap Search vendor "Opensuse" for product "Leap" | 15.0 Search vendor "Opensuse" for product "Leap" and version "15.0" | - |
Affected
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Opensuse Search vendor "Opensuse" | Leap Search vendor "Opensuse" for product "Leap" | 15.1 Search vendor "Opensuse" for product "Leap" and version "15.1" | - |
Affected
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Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0" | - |
Affected
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Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Affected
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