Vulnerability-Lookup

CVE-2023-45140 (GCVE-0-2023-45140)

Vulnerability from cvelistv5 – Published: 2023-11-08 15:26 – Updated: 2024-09-12 19:10

Title

Group-based JIT MFA bypass on scp and sftp in The Bastion

Summary

The Bastion provides authentication, authorization, traceability and auditability for SSH accesses. SCP and SFTP plugins don't honor group-based JIT MFA. Establishing a SCP/SFTP connection through The Bastion via a group access where MFA is enforced does not ask for additional factor. This abnormal behavior only applies to per-group-based JIT MFA. Other MFA setup types, such as Immediate MFA, JIT MFA on a per-plugin basis and JIT MFA on a per-account basis are not affected. This issue has been patched in version 3.14.15.

Severity

4.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-04 14:25 UTC

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/ovh/the-bastion/security/advis…	x_refsource_CONFIRM
https://github.com/ovh/the-bastion/releases/tag/v…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
ovh	the-bastion	Affected: >= 3.0.0, <= 3.14.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2023-45140

Vulnerability from fkie_nvd - Published: 2023-11-08 16:15 - Updated: 2026-06-17 06:28

Severity

4.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.6 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/ovh/the-bastion/releases/tag/v3.14.15	Patch
security-advisories@github.com	https://github.com/ovh/the-bastion/security/advisories/GHSA-pr4q-w883-pf5x	Mitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/ovh/the-bastion/releases/tag/v3.14.15	Patch
af854a3a-2127-422b-91ae-364da2661108	https://github.com/ovh/the-bastion/security/advisories/GHSA-pr4q-w883-pf5x	Mitigation, Vendor Advisory

Impacted products

	Vendor	Product	Version
	ovh	the-bastion	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "the-bastion",
          "vendor": "ovh",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.0.0, \u003c= 3.14.0"
            }
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    },
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    }
  ],
  "id": "CVE-2023-45140",
  "lastModified": "2026-06-17T06:28:18.033",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 2.5,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-45140",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-04T14:25:53.100320Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2023-11-08T16:15:09.800",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/ovh/the-bastion/releases/tag/v3.14.15"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/ovh/the-bastion/security/advisories/GHSA-pr4q-w883-pf5x"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/ovh/the-bastion/releases/tag/v3.14.15"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/ovh/the-bastion/security/advisories/GHSA-pr4q-w883-pf5x"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-306"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GSD-2023-45140

Vulnerability from gsd - Updated: 2023-12-13 01:20

Details

Aliases

CVE-2023-45140

Aliases

CVE-2023-45140

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2023-45140",
    "id": "GSD-2023-45140"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-45140"
      ],
      "details": "The Bastion provides authentication, authorization, traceability and auditability for SSH accesses. SCP and SFTP plugins don\u0027t honor group-based JIT MFA. Establishing a SCP/SFTP connection through The Bastion via a group access where MFA is enforced does not ask for additional factor. This abnormal behavior only applies to per-group-based JIT MFA. Other MFA setup types, such as Immediate MFA, JIT MFA on a per-plugin basis and JIT MFA on a per-account basis are not affected. This issue has been patched in version 3.14.15.",
      "id": "GSD-2023-45140",
      "modified": "2023-12-13T01:20:37.887135Z",
      "schema_version": "1.4.0"
    }
  },
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                    "version": {
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                        }
                      ]
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          }
        ]
      },
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            "attackComplexity": "LOW",
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            "baseScore": 4.8,
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                "value": "CWE-306: Missing Authentication for Critical Function"
              }
            ]
          }
        ]
      },
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          }
        ]
      },
      "source": {
        "advisory": "GHSA-pr4q-w883-pf5x",
        "discovery": "UNKNOWN"
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
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                "cpe_name": [],
                "versionEndExcluding": "3.14.15",
                "vulnerable": true
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            ],
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        "description": {
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            }
          ]
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        "references": {
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            {
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            }
          ]
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      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.6,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.1,
          "impactScore": 2.5
        }
      },
      "lastModifiedDate": "2023-11-16T18:50Z",
      "publishedDate": "2023-11-08T16:15Z"
    }
  }
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CVE-2023-45140 (GCVE-0-2023-45140)

FKIE_CVE-2023-45140

GSD-2023-45140

Tags

Sightings

Nomenclature

Related by attack behaviour