Quote:A micropatch is now available for a zero-day OpenOffice code execution vulnerability which can be triggered via automated macro execution following a mouseover event when viewing a maliciously crafted ODT document.

Using an exploit for this zero-day vulnerability, potential attackers can issue a directory traversal attack against users of all versions of OpenOffice and all LibreOffice releases up to and including 6.0.6/6.1.2.1.

However, the OpenOffice 0day which is currently tracked as CVE-2018-16858 and received a CVSS3 Base Score of 7.8 from Red Hat, has been fixed by The Document Foundation in the LibreOffice 6.0.7/6.1.3 release after receiving a report from security researcher Alex Inführ who discovered the issue.

The researcher also created and published a Proof-of-Concept for CVE-2018-16858 in the form of a FODT extension which he also uploaded to the VirusTotal malware scanning service.

According to Inführ, the OpenOffice zero-day vulnerability impacts LibreOffice because of "a feature where documents can specify that pre-installed macros can be executed on various document events such as mouse-over" as detailed in the Directory traversal flaw in script execution advisory published by The Document Foundation on February 1.