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


- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Fix available:** Yes
- **Published:** 6 Sep 2019
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-873f-q5vx-w7hm

## What is CVE-2019-9855?

CVE-2019-9855 is a critical vulnerability in Libreoffice Libreoffice, published on 6 Sep 2019. 

### Official 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.

Weakness: CWE-417

## Which versions are affected by CVE-2019-9855?

It affects 2 products.


Products: Libreoffice Libreoffice, Opensuse Leap.

## How do I fix CVE-2019-9855?

Upgrade to a fixed version.

## Is CVE-2019-9855 being exploited?

There is no known exploitation of CVE-2019-9855 in the wild and no public exploit code.

## Other vulnerabilities in Libreoffice Libreoffice

- [CVE-2024-5261](https://insights.sbomify.com/CVE-2024-5261/): TLS certificate are not properly verified when utilizing LibreOfficeKit (critical 10.0)
- [CVE-2018-14939](https://insights.sbomify.com/CVE-2018-14939/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-8358](https://insights.sbomify.com/CVE-2017-8358/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-7882](https://insights.sbomify.com/CVE-2017-7882/): Memory corruption in n/a (critical 9.8)
- [CVE-2016-10327](https://insights.sbomify.com/CVE-2016-10327/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-9855 and fix it if it is affected.

What it is: CVE-2019-9855 is a critical vulnerability in Libreoffice Libreoffice, published on 6 Sep 2019. 
Exploitation: There is no known exploitation of CVE-2019-9855 in the wild and no public exploit code.

Affected product: Libreoffice Libreoffice. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2019-9855/ (Markdown: https://insights.sbomify.com/CVE-2019-9855/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-9855
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-9855
- OSV: https://osv.dev/vulnerability/CVE-2019-9855

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-9855/
Summaries are generated and may contain mistakes; the official description above is the record.