CVE-2019-9854 vulnerability in LibreOffice and Other Products
Published on September 6, 2019
Unsafe URL assembly flaw in allowed script location check
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.
Products Associated with CVE-2019-9854
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Affected Versions
Document Foundation LibreOffice:- Version 6.2 and below 6.2.7 is affected.
- Version 6.3 and below 6.3.1 is affected.
Exploit Probability
EPSS
1.93%
Percentile
78.90%
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.