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://ip.voidsec.com), the browser can disclose a private IP address in a STUN request.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 28.7%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.0
- 4.3 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- EPSS
- 28.71% probability · 98th percentile
- Public exploits
- 1 in Exploit-DB · first 5 April 2018
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- duckduckgo/duckduckgo
- Source
- cve@mitre.org
EPSS moved from 27.6% on 21 September 2026 to 28.7% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- https://datarift.blogspot.com/p/private-ip-leakage-using-webrtc.htmlThird Party Advisory
- https://github.com/rapid7/metasploit-framework/pull/9538Issue Tracking, Third Party Advisory
- https://news.ycombinator.com/item?id=16699270Third Party Advisory
- https://voidsec.com/vpn-leak/Third Party Advisory
- https://www.exploit-db.com/exploits/44403/Exploit, Third Party Advisory, VDB Entry
- https://datarift.blogspot.com/p/private-ip-leakage-using-webrtc.htmlThird Party Advisory
- https://github.com/rapid7/metasploit-framework/pull/9538Issue Tracking, Third Party Advisory
- https://news.ycombinator.com/item?id=16699270Third Party Advisory
- https://voidsec.com/vpn-leak/Third Party Advisory
- https://www.exploit-db.com/exploits/44403/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.