Vulnerability-Lookup

FKIE_CVE-2021-31776

Vulnerability from fkie_nvd - Published: 2021-04-29 01:15 - Updated: 2026-06-17 03:52

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

Aviatrix VPN Client before 2.14.14 on Windows has an unquoted search path that enables local privilege escalation to the SYSTEM user, if the machine is misconfigured to allow unprivileged users to write to directories that are supposed to be restricted to administrators.

References

URL	Tags
cve@mitre.org	https://docs.aviatrix.com/Downloads/samlclient.html	Product, Vendor Advisory
cve@mitre.org	https://docs.aviatrix.com/Downloads/samlclient.html#windows-win	Product, Vendor Advisory
cve@mitre.org	https://docs.aviatrix.com/HowTos/changelog.html#aviatrix-vpn-client-changelog	Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://docs.aviatrix.com/Downloads/samlclient.html	Product, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://docs.aviatrix.com/Downloads/samlclient.html#windows-win	Product, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://docs.aviatrix.com/HowTos/changelog.html#aviatrix-vpn-client-changelog	Release Notes, Vendor Advisory

Impacted products

	Vendor	Product	Version
	aviatrix	vpn_client	*
	microsoft	windows	-

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:aviatrix:vpn_client:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FCA75989-664A-4906-9F08-65451D334B29",
              "versionEndExcluding": "2.14.14",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
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              "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Aviatrix VPN Client before 2.14.14 on Windows has an unquoted search path that enables local privilege escalation to the SYSTEM user, if the machine is misconfigured to allow unprivileged users to write to directories that are supposed to be restricted to administrators."
    },
    {
      "lang": "es",
      "value": "Aviatrix VPN Client versiones anteriores a 2.14.14 en Windows, presenta una ruta de b\u00fasqueda sin comillas que habilita una escalada de privilegios local al usuario SYSTEM, si la m\u00e1quina est\u00e1 configurada inapropiadamente para permitir a usuarios sin privilegios escribir en directorios que se supone que est\u00e1n restringidos a administradores"
    }
  ],
  "id": "CVE-2021-31776",
  "lastModified": "2026-06-17T03:52:13.140",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 7.2,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-04-29T01:15:08.083",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Product",
        "Vendor Advisory"
      ],
      "url": "https://docs.aviatrix.com/Downloads/samlclient.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Product",
        "Vendor Advisory"
      ],
      "url": "https://docs.aviatrix.com/Downloads/samlclient.html#windows-win"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://docs.aviatrix.com/HowTos/changelog.html#aviatrix-vpn-client-changelog"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product",
        "Vendor Advisory"
      ],
      "url": "https://docs.aviatrix.com/Downloads/samlclient.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product",
        "Vendor Advisory"
      ],
      "url": "https://docs.aviatrix.com/Downloads/samlclient.html#windows-win"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://docs.aviatrix.com/HowTos/changelog.html#aviatrix-vpn-client-changelog"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-428"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-31776 (GCVE-0-2021-31776)

Vulnerability from cvelistv5 – Published: 2021-04-29 00:03 – Updated: 2024-08-03 23:03

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2262 records in the last 180 days details

References

3 references

URL	Tags
https://docs.aviatrix.com/Downloads/samlclient.html	x_refsource_MISC
https://docs.aviatrix.com/HowTos/changelog.html#a…	x_refsource_CONFIRM
https://docs.aviatrix.com/Downloads/samlclient.ht…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T23:03:33.855Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        },
        "references": [
          {
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              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://docs.aviatrix.com/Downloads/samlclient.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://docs.aviatrix.com/HowTos/changelog.html#aviatrix-vpn-client-changelog"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://docs.aviatrix.com/Downloads/samlclient.html#windows-win"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
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              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "description": "n/a",
              "lang": "en",
              "type": "text"
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      "providerMetadata": {
        "dateUpdated": "2021-04-29T00:03:56.000Z",
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      },
      "references": [
        {
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          ],
          "url": "https://docs.aviatrix.com/Downloads/samlclient.html"
        },
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          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://docs.aviatrix.com/HowTos/changelog.html#aviatrix-vpn-client-changelog"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://docs.aviatrix.com/Downloads/samlclient.html#windows-win"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-31776",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
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        "problemtype": {
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                  "value": "n/a"
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            },
            {
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            },
            {
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              "refsource": "MISC",
              "url": "https://docs.aviatrix.com/Downloads/samlclient.html#windows-win"
            }
          ]
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      }
    }
  },
  "cveMetadata": {
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    "assignerShortName": "mitre",
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    "dateReserved": "2021-04-23T00:00:00.000Z",
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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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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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