{"cve":"CVE-2019-20786","nvd":{"published":"2020-04-19T20:15:11.587","modified":"2026-06-17T02:31:11.583","status":"Modified","description":"handleIncomingPacket in conn.go in Pion DTLS before 1.5.2 lacks a check for application data with epoch 0, which allows remote attackers to inject arbitrary unencrypted data after handshake completion.","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:H/A:H","score":9.8},"cwes":["CWE-287"],"references":["https://github.com/pion/dtls/commit/fd73a5df2ff0e1fb6ae6a51e2777d7a16cc4f4e0","https://github.com/pion/dtls/compare/v1.5.1...v1.5.2","https://www.usenix.org/conference/usenixsecurity20/presentation/fiterau-brostean","https://www.usenix.org/system/files/sec20fall_fiterau-brostean_prepub.pdf","https://github.com/pion/dtls/commit/fd73a5df2ff0e1fb6ae6a51e2777d7a16cc4f4e0"],"products":["pion:dtls"],"source":"nvd","synced_at":"2026-10-19T21:04:18.695612450+00:00"},"epss":{"cve":"CVE-2019-20786","score":0.03012,"percentile":0.87413,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-7gfg-6934-mqq2","url":"https://osv.dev/vulnerability/GHSA-7gfg-6934-mqq2","summary":"Improper Authenication in Pion DTLS","modified":"2023-11-08T04:01:31.054282Z","packages":[{"ecosystem":"Go","name":"github.com/pion/dtls","purl":"pkg:golang/github.com/pion/dtls","ranges":["<1.5.2"],"fixed":["1.5.2"]}]},{"id":"GO-2020-0038","url":"https://osv.dev/vulnerability/GO-2020-0038","summary":"Improper authentication in github.com/pion/dtls","modified":"2024-05-20T16:03:47Z","packages":[{"ecosystem":"Go","name":"github.com/pion/dtls","purl":"pkg:golang/github.com/pion/dtls","ranges":["<1.5.2"],"fixed":["1.5.2"]}]}],"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."]}