CVE-2018-6849 — In the WebRTC component in DuckDuckGo 4

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.

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-04-01T18:00:00.000Z
• Last modified: 2024-08-05T06:17:15.825Z

09References

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