modules:
  - module: golang.org/x/crypto
    versions:
      - fixed: 0.0.0-20170330155735-e4e2799dd7aa
    vulnerable_at: 0.0.0-20170317163734-459e26527287
    packages:
      - package: golang.org/x/crypto/ssh
        symbols:
          - NewClientConn
        derived_symbols:
          - Dial
description: |
    By default host key verification is disabled which allows for
    man-in-the-middle attacks against SSH clients if
    ClientConfig.HostKeyCallback is not set.
published: 2021-04-14T20:04:52Z
cves:
  - CVE-2017-3204
ghsas:
  - GHSA-xhjq-w7xm-p8qj
credit: Phil Pennock
references:
  - fix: https://go.dev/cl/340830
  - fix: https://go.googlesource.com/crypto/+/e4e2799dd7aab89f583e1d898300d96367750991
  - report: https://go.dev/issue/19767
  - web: https://bridge.grumpy-troll.org/2017/04/golang-ssh-security/