module: golang.org/x/crypto
package: golang.org/x/crypto/ssh
versions:
  - fixed: v0.0.0-20220314234659-1baeb1ce4c0b
description: |
   Attackers can cause a crash in SSH servers when the server has been
   configured by passing a Signer to ServerConfig.AddHostKey such that
    1) the Signer passed to AddHostKey does not implement AlgorithmSigner, and
    2) the Signer passed to AddHostKey returns a key of type “ssh-rsa” from its
     PublicKey method.

   Servers that only use Signer implementations provided by the ssh package are
   unaffected.
cves:
  - CVE-2022-27191
ghsas:
  - GHSA-8c26-wmh5-6g9v
symbols:
  - ServerConfig.AddHostKey
derived_symbols:
  - ServerConfig.AddHostKey
links:
    pr: https://go.dev/cl/392355
    commit: https://go.googlesource.com/crypto/+/1baeb1ce4c0b006eff0f294c47cb7617598dfb3d
    context:
      - https://groups.google.com/g/golang-announce
      - https://groups.google.com/g/golang-announce/c/-cp44ypCT5s