Vulnerability-Lookup

GHSA-XHJQ-W7XM-P8QJ

Vulnerability from github – Published: 2023-02-07 22:39 – Updated: 2024-04-19 21:43

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

Show details on source website

JSON

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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"
}

CVE-2017-3204 (GCVE-0-2017-3204)

Vulnerability from cvelistv5 – Published: 2017-04-04 14:00 – Updated: 2024-08-05 14:16

Summary

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

Severity

No CVSS data available.

CWE

CWE-310

Assigner

certcc mitre root Scorecard

References

5 references

URL	Tags
https://godoc.org/golang.org/x/crypto/ssh	x_refsource_MISC
https://github.com/golang/go/issues/19767	x_refsource_CONFIRM
https://bridge.grumpy-troll.org/2017/04/golang-ss…	x_refsource_MISC
https://github.com/golang/crypto/commit/e4e2799dd…	x_refsource_CONFIRM
http://www.securityfocus.com/bid/97481	vdb-entryx_refsource_BID

Impacted products

1 product

Vendor	Product	Version
Go	SSH library	Affected: prior to commit e4e2799

Date Public

2017-04-02 00:00

Show details on NVD website

JSON

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        "references": [
          {
            "tags": [
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            ],
            "url": "https://godoc.org/golang.org/x/crypto/ssh"
          },
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            "url": "https://github.com/golang/go/issues/19767"
          },
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            ],
            "url": "https://bridge.grumpy-troll.org/2017/04/golang-ssh-security/"
          },
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            ],
            "url": "https://github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991"
          },
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        ],
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            }
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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GHSA-XHJQ-W7XM-P8QJ

CVE-2017-3204 (GCVE-0-2017-3204)

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Sightings

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