{
  "schema_version": "1.3.1",
  "id": "GO-2021-0227",
  "modified": "0001-01-01T00:00:00Z",
  "published": "2022-02-17T17:35:32Z",
  "aliases": [
    "CVE-2020-29652",
    "GHSA-3vm4-22fp-5rfm"
  ],
  "summary": "Panic on crafted authentication request message in golang.org/x/crypto/ssh",
  "details": "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.",
  "affected": [
    {
      "package": {
        "name": "golang.org/x/crypto",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20201216223049-8b5274cf687f"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "golang.org/x/crypto/ssh",
            "symbols": [
              "NewServerConn",
              "connection.serverAuthenticate"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "FIX",
      "url": "https://go.dev/cl/278852"
    },
    {
      "type": "FIX",
      "url": "https://go.googlesource.com/crypto/+/8b5274cf687fd9316b4108863654cc57385531e8"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/ouZIlBimOsE?pli=1"
    }
  ],
  "credits": [
    {
      "name": "Joern Schneewesiz (GitLab Security Research Team)"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2021-0227"
  }
}