id: GO-2021-0227
modules:
    - module: golang.org/x/crypto
      versions:
        - fixed: 0.0.0-20201216223049-8b5274cf687f
      vulnerable_at: 0.0.0-20201208171446-5f87f3452ae9
      packages:
        - package: golang.org/x/crypto/ssh
          symbols:
            - connection.serverAuthenticate
          derived_symbols:
            - NewServerConn
summary: Panic on crafted authentication request message in golang.org/x/crypto/ssh
description: |-
    Clients can cause a panic in SSH servers. An attacker can craft an
    authentication request message for the “gssapi-with-mic” method which will
    cause NewServerConn to panic via a nil pointer dereference if
    ServerConfig.GSSAPIWithMICConfig is nil.
published: 2022-02-17T17:35:32Z
cves:
    - CVE-2020-29652
ghsas:
    - GHSA-3vm4-22fp-5rfm
credits:
    - Joern Schneewesiz (GitLab Security Research Team)
references:
    - fix: https://go.dev/cl/278852
    - fix: https://go.googlesource.com/crypto/+/8b5274cf687fd9316b4108863654cc57385531e8
    - web: https://groups.google.com/g/golang-announce/c/ouZIlBimOsE?pli=1