Auth bypass in Pion Dtls
CVE-2019-20786
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.030 (86.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.029 · newest: 0.030 · change: +0.001
Affected products
Weakness classification (CWE)
References
- www.usenix.org/system/files/sec20fall_fiterau-brostean_prepub.pdf (Exploit, Third Party Advisory)
- www.usenix.org/conference/usenixsecurity20/presentation/fiterau-brostean (Third Party Advisory)
- github.com/pion/dtls/commit/fd73a5df2ff0e1fb6ae6a51e2777d7a16cc4f4e0 (Patch, Third Party Advisory)
- github.com/pion/dtls/compare/v1.5.1...v1.5.2 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-20786?
- CVE-2019-20786 is a critical-severity vulnerability in Pion Dtls, classified under Improper Authentication. CVSS score: 9.8/10. Published 2020-04-19.
- How severe is CVE-2019-20786?
- Critical severity. CVSS v3 base score is 9.8 out of 10.