Title: CVE-2019-9848 LibreLogo arbitrary script execution

Announced: July 16, 2019

Fixed in: 6.2.5


LibreOffice has a feature where documents can specify that pre-installed scripts can be executed on various document events such as mouse-over, etc.

LibreOffice is typically also bundled with LibreLogo, a programmable turtle vector graphics script, which can be manipulated into executing arbitrary python commands.

By using the document event feature to trigger LibreLogo to execute python contained within a document a malicious document could be constructed which would execute arbitrary python commands silently without warning.

In the fixed versions, LibreLogo cannot be called from a document event handler..


Thanks to Nils Emmerich of ERNW Research GmbH for discovering and reporting this issue