packages:
  - module: golang.org/x/crypto
    package: golang.org/x/crypto/ssh
    symbols:
      - NewClientConn
    versions:
      - fixed: 0.0.0-20170330155735-e4e2799dd7aa
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
credit: Phil Pennock
links:
    pr: https://go-review.googlesource.com/38701
    commit: https://go.googlesource.com/crypto/+/e4e2799dd7aab89f583e1d898300d96367750991
    context:
      - https://go.dev/issue/19767
      - https://bridge.grumpy-troll.org/2017/04/golang-ssh-security/