packages:
  - module: github.com/pion/dtls
    symbols:
      - Conn.handleIncomingPacket
    derived_symbols:
      - Client
      - Dial
      - Listener.Accept
      - Resume
      - Server
    versions:
      - fixed: v1.5.2
description: |
    Due to improper verification of packets, unencrypted packets containing
    application data are accepted after the initial handshake. This allows
    an attacker to inject arbitrary data which the client/server believes
    was encrypted, despite not knowing the session key.
published: 2021-04-14T20:04:52Z
cves:
  - CVE-2019-20786
ghsas:
  - GHSA-7gfg-6934-mqq2
links:
    pr: https://github.com/pion/dtls/pull/128
    commit: https://github.com/pion/dtls/commit/fd73a5df2ff0e1fb6ae6a51e2777d7a16cc4f4e0
    context:
      - https://www.usenix.org/system/files/sec20fall_fiterau-brostean_prepub.pdf