GHSA-XHJQ-W7XM-P8QJ

Vulnerability from github – Published: 2023-02-07 22:39 – Updated: 2024-04-19 21:43
VLAI?
Summary
golang.org/x/crypto/ssh Man-in-the-Middle attack
Details

The Go SSH library (golang.org/x/crypto/ssh) by default does not verify host keys, facilitating man-in-the-middle attacks if ClientConfig.HostKeyCallback is not set. Default behavior changed in commit e4e2799 to require explicitly registering a hostkey verification mechanism.

Severity ?
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "golang.org/x/crypto"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20170330155735-e4e2799dd7aa"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2017-3204"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2023-02-07T22:39:34Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "The Go SSH library (golang.org/x/crypto/ssh) by default does not verify host keys, facilitating man-in-the-middle attacks if ClientConfig.HostKeyCallback is not set. Default behavior changed in commit e4e2799 to require explicitly registering a hostkey verification mechanism.",
  "id": "GHSA-xhjq-w7xm-p8qj",
  "modified": "2024-04-19T21:43:20Z",
  "published": "2023-02-07T22:39:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-3204"
    },
    {
      "type": "WEB",
      "url": "https://github.com/golang/go/issues/19767"
    },
    {
      "type": "WEB",
      "url": "https://github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991"
    },
    {
      "type": "WEB",
      "url": "https://bridge.grumpy-troll.org/2017/04/golang-ssh-security"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/cl/340830"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/cl/38701"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/issue/19767"
    },
    {
      "type": "WEB",
      "url": "https://go.googlesource.com/crypto/+/e4e2799dd7aab89f583e1d898300d96367750991"
    },
    {
      "type": "WEB",
      "url": "https://godoc.org/golang.org/x/crypto/ssh"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2020-0013"
    },
    {
      "type": "WEB",
      "url": "https://web.archive.org/web/20170423080311/https://www.securityfocus.com/bid/97481"
    },
    {
      "type": "WEB",
      "url": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-3204"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "golang.org/x/crypto/ssh Man-in-the-Middle attack"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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