{"cve":"CVE-2020-4067","nvd":{"published":"2020-06-29T20:15:10.413","modified":"2026-06-17T03:19:30.783","status":"Modified","description":"In coturn before version 4.5.1.3, there is an issue whereby STUN/TURN response buffer is not initialized properly. There is a leak of information between different client connections. One client (an attacker) could use their connection to intelligently query coturn to get interesting bytes in the padding bytes from the connection of another client. This has been fixed in 4.5.1.3.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-665"],"references":["http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00010.html","https://github.com/coturn/coturn/blob/aab60340b201d55c007bcdc853230f47aa2dfdf1/ChangeLog#L15","https://github.com/coturn/coturn/issues/583","https://github.com/coturn/coturn/security/advisories/GHSA-c8r8-8vp5-6gcm","https://lists.debian.org/debian-lts-announce/2020/07/msg00002.html"],"products":["canonical:ubuntu_linux","coturn_project:coturn","debian:debian_linux","fedoraproject:fedora","opensuse:leap"],"source":"nvd","synced_at":"2026-10-19T21:06:22.076270124+00:00"},"epss":{"cve":"CVE-2020-4067","score":0.01898,"percentile":0.79659,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}