CWE
417
Advisory Published
Updated

CVE-2019-9855: Windows 8.3 path equivalence handling flaw allows LibreLogo script execution

First published: Fri Sep 06 2019(Updated: )

LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can execute arbitrary python commands contained with the document it is launched from. LibreOffice also has a feature where documents can specify that pre-installed scripts can be executed on various document script events such as mouse-over, etc. Protection was added to block calling LibreLogo from script event handers. However a Windows 8.3 path equivalence handling flaw left LibreOffice vulnerable under Windows that a document could trigger executing LibreLogo via a Windows filename pseudonym. This issue affects: Document Foundation LibreOffice 6.2 versions prior to 6.2.7; 6.3 versions prior to 6.3.1.

Credit: security@documentfoundation.org

Affected SoftwareAffected VersionHow to fix
The Document Foundation LibreOffice>=6.2.0<6.2.7
The Document Foundation LibreOffice>=6.3.0<6.3.1
Microsoft Windows
openSUSE=15.0
openSUSE=15.1

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Frequently Asked Questions

  • What is CVE-2019-9855?

    CVE-2019-9855 is a vulnerability in LibreOffice that allows arbitrary Python commands to be executed through the LibreLogo feature.

  • What software is affected by CVE-2019-9855?

    LibreOffice versions 6.2.0 to 6.2.7 and versions 6.3.0 to 6.3.1 are affected by CVE-2019-9855.

  • How severe is CVE-2019-9855?

    CVE-2019-9855 has a severity rating of 9.8, which is considered critical.

  • How can I fix CVE-2019-9855?

    To fix CVE-2019-9855, update LibreOffice to a version that is not affected by the vulnerability.

  • Where can I find more information about CVE-2019-9855?

    You can find more information about CVE-2019-9855 on the official LibreOffice website and the openSUSE security advisory.

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