certfr_avis - certfr-2021-avi-641

CERTFR-2021-AVI-641

Vulnerability from certfr_avis

De multiples vulnérabilités ont été découvertes dans le client Nextcloud Desktop. Elles permettent à un attaquant de provoquer une atteinte à la confidentialité des données.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

	Vendor	Product	Description
	Nextcloud	N/A	client Nextcloud Desktop version antérieures à 3.3.0

References

Title

Publication Time

Tags

Bulletin de sécurité Nextcloud GHSA-6q2w-v879-q24v du 18 août 2021	None	vendor-advisory
Bulletin de sécurité Nextcloud GHSA-f5fr-5gcv-6cc5 du 18 août 2021	None	vendor-advisory

Show details on source website

JSON

To clipboard

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "client Nextcloud Desktop version ant\u00e9rieures \u00e0 3.3.0",
      "product": {
        "name": "N/A",
        "vendor": {
          "name": "Nextcloud",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": null,
  "content": "## Solution\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des\ncorrectifs (cf. section Documentation).\n",
  "cves": [
    {
      "name": "CVE-2021-37617",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-37617"
    },
    {
      "name": "CVE-2021-32728",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-32728"
    }
  ],
  "initial_release_date": "2021-08-19T00:00:00",
  "last_revision_date": "2021-08-20T00:00:00",
  "links": [],
  "reference": "CERTFR-2021-AVI-641",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2021-08-19T00:00:00.000000"
    },
    {
      "description": "correction du nom du produit.",
      "revision_date": "2021-08-20T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "Ex\u00e9cution de code arbitraire"
    },
    {
      "description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans le client Nextcloud\nDesktop. Elles permettent \u00e0 un attaquant de provoquer une atteinte \u00e0 la\nconfidentialit\u00e9 des donn\u00e9es.\n",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans le client Nextcloud Desktop",
  "vendor_advisories": [
    {
      "published_at": null,
      "title": "Bulletin de s\u00e9curit\u00e9 Nextcloud GHSA-6q2w-v879-q24v du 18 ao\u00fbt 2021",
      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q2w-v879-q24v"
    },
    {
      "published_at": null,
      "title": "Bulletin de s\u00e9curit\u00e9 Nextcloud GHSA-f5fr-5gcv-6cc5 du 18 ao\u00fbt 2021",
      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5"
    }
  ]
}

CVE-2021-37617 (GCVE-0-2021-37617)

Vulnerability from cvelistv5

Published

2021-08-18 17:25

Modified

2024-08-04 01:23

Severity ?

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

CWE

CWE-426 - Untrusted Search Path

Summary

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. The Nextcloud Desktop Client invokes its uninstaller script when being installed to make sure there are no remnants of previous installations. In versions 3.0.3 through 3.2.4, the Client searches the `Uninstall.exe` file in a folder that can be written by regular users. This could lead to a case where a malicious user creates a malicious `Uninstall.exe`, which would be executed with administrative privileges on the Nextcloud Desktop Client installation. This issue is fixed in Nextcloud Desktop Client version 3.3.0. As a workaround, do not allow untrusted users to create content in the `C:\` system folder and verify that there is no malicious `C:\Uninstall.exe` file on the system.

References

URL

Tags

	https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q2w-v879-q24v	x_refsource_CONFIRM
	https://github.com/nextcloud/desktop/pull/3497	x_refsource_MISC
	https://hackerone.com/reports/1240749	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	nextcloud	security-advisories	Version: >= 3.0.3 , <= 3.2.4

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T01:23:01.309Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
          {
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              "x_transferred"
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          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/nextcloud/desktop/pull/3497"
          },
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            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/1240749"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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        {
          "product": "security-advisories",
          "vendor": "nextcloud",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.0.3 , \u003c= 3.2.4"
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      ],
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        {
          "lang": "en",
          "value": "The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. The Nextcloud Desktop Client invokes its uninstaller script when being installed to make sure there are no remnants of previous installations. In versions 3.0.3 through 3.2.4, the Client searches the `Uninstall.exe` file in a folder that can be written by regular users. This could lead to a case where a malicious user creates a malicious `Uninstall.exe`, which would be executed with administrative privileges on the Nextcloud Desktop Client installation. This issue is fixed in Nextcloud Desktop Client version 3.3.0. As a workaround, do not allow untrusted users to create content in the `C:\\` system folder and verify that there is no malicious `C:\\Uninstall.exe` file on the system."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-426",
              "description": "CWE-426: Untrusted Search Path",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-08-18T17:25:10",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q2w-v879-q24v"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nextcloud/desktop/pull/3497"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/1240749"
        }
      ],
      "source": {
        "advisory": "GHSA-6q2w-v879-q24v",
        "discovery": "UNKNOWN"
      },
      "title": "Untrusted Search Path in Nextcloud Desktop Client",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2021-37617",
          "STATE": "PUBLIC",
          "TITLE": "Untrusted Search Path in Nextcloud Desktop Client"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "security-advisories",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003e= 3.0.3 , \u003c= 3.2.4"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "nextcloud"
              }
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        "data_format": "MITRE",
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            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        },
        "problemtype": {
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              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-426: Untrusted Search Path"
                }
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          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q2w-v879-q24v",
              "refsource": "CONFIRM",
              "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q2w-v879-q24v"
            },
            {
              "name": "https://github.com/nextcloud/desktop/pull/3497",
              "refsource": "MISC",
              "url": "https://github.com/nextcloud/desktop/pull/3497"
            },
            {
              "name": "https://hackerone.com/reports/1240749",
              "refsource": "MISC",
              "url": "https://hackerone.com/reports/1240749"
            }
          ]
        },
        "source": {
          "advisory": "GHSA-6q2w-v879-q24v",
          "discovery": "UNKNOWN"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
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    "datePublished": "2021-08-18T17:25:10",
    "dateReserved": "2021-07-29T00:00:00",
    "dateUpdated": "2024-08-04T01:23:01.309Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

CVE-2021-32728 (GCVE-0-2021-32728)

Vulnerability from cvelistv5

Published

2021-08-18 16:00

Modified

2024-08-03 23:33

Severity ?

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

CWE

CWE-295 - Improper Certificate Validation

Summary

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. Clients using the Nextcloud end-to-end encryption feature download the public and private key via an API endpoint. In versions prior to 3.3.0, the Nextcloud Desktop client fails to check if a private key belongs to previously downloaded public certificate. If the Nextcloud instance serves a malicious public key, the data would be encrypted for this key and thus could be accessible to a malicious actor. This issue is fixed in Nextcloud Desktop Client version 3.3.0. There are no known workarounds aside from upgrading.

References

URL

Tags

	https://hackerone.com/reports/1189162	x_refsource_MISC
	https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5	x_refsource_CONFIRM
	https://github.com/nextcloud/desktop/pull/3338	x_refsource_MISC
	https://www.debian.org/security/2021/dsa-4974	vendor-advisory, x_refsource_DEBIAN

Impacted products

	Vendor	Product	Version
	nextcloud	security-advisories	Version: < 3.3.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T23:33:54.918Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/1189162"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/nextcloud/desktop/pull/3338"
          },
          {
            "name": "DSA-4974",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2021/dsa-4974"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "security-advisories",
          "vendor": "nextcloud",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.3.0"
            }
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      ],
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          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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          }
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      "problemTypes": [
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          "descriptions": [
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              "description": "CWE-295: Improper Certificate Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-09-19T23:06:11",
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          ],
          "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f5fr-5gcv-6cc5"
        },
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          "tags": [
            "x_refsource_MISC"
          ],
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        },
        {
          "name": "DSA-4974",
          "tags": [
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            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2021/dsa-4974"
        }
      ],
      "source": {
        "advisory": "GHSA-f5fr-5gcv-6cc5",
        "discovery": "UNKNOWN"
      },
      "title": "End-to-end encryption device setup did not verify public key",
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          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2021-32728",
          "STATE": "PUBLIC",
          "TITLE": "End-to-end encryption device setup did not verify public key"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "security-advisories",
                      "version": {
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                          {
                            "version_value": "\u003c 3.3.0"
                          }
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            "confidentialityImpact": "HIGH",
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            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
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        },
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              "url": "https://hackerone.com/reports/1189162"
            },
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            },
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    "datePublished": "2021-08-18T16:00:13",
    "dateReserved": "2021-05-12T00:00:00",
    "dateUpdated": "2024-08-03T23:33:54.918Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

Tags

Taxonomy of the tags.

All sightings related to this event Export sightings related to this event

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted

CERTFR-2021-AVI-641

Vulnerability from certfr_avis

Solution

CVE-2021-37617 (GCVE-0-2021-37617)

Vulnerability from cvelistv5

CVE-2021-32728 (GCVE-0-2021-32728)

Vulnerability from cvelistv5

Tags

Sightings

Nomenclature