libreoffice libreoffice CVE-2019-9852 vulnerability in LibreOffice and Other Products
Published on August 15, 2019

Insufficient URL encoding flaw in allowed script location check

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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-2018-16858, to avoid a directory traversal attack where scripts in arbitrary locations on the file system could be executed. However this new protection could be bypassed by a URL encoding attack. In the fixed versions, the parsed url describing the script location is correctly encoded before further processing. This issue affects: Document Foundation LibreOffice versions prior to 6.2.6.

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Weakness Type

What is an Output Sanitization Vulnerability?

The software prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.

CVE-2019-9852 has been classified to as an Output Sanitization vulnerability or weakness.


Products Associated with CVE-2019-9852

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2019-9852 are published in these products:

LibreOffice
 
Debian Linux
 
Fedora Project Fedora
 
Canonical Ubuntu Linux
 
OpenSuse Leap
 

Affected Versions

Document Foundation LibreOffice:

Exploit Probability

EPSS
1.93%
Percentile
78.85%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.