gsd-2021-32689
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
Nextcloud Talk is a fully on-premises audio/video and chat communication service. In versions prior to 11.2.2, if a user was able to reuse an earlier used username, they could get access to any chat message sent to the previous user with this username. The issue was patched in versions 11.2.2 and 11.3.0. As a workaround, don't allow users to choose usernames themselves. This is the default behaviour of Nextcloud, but some user providers may allow doing so.
Aliases
Aliases
CVE-2021-32689


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-32689",
    "description": "Nextcloud Talk is a fully on-premises audio/video and chat communication service. In versions prior to 11.2.2, if a user was able to reuse an earlier used username, they could get access to any chat message sent to the previous user with this username. The issue was patched in versions 11.2.2 and 11.3.0. As a workaround, don\u0027t allow users to choose usernames themselves. This is the default behaviour of Nextcloud, but some user providers may allow doing so.",
    "id": "GSD-2021-32689"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-32689"
      ],
      "details": "Nextcloud Talk is a fully on-premises audio/video and chat communication service. In versions prior to 11.2.2, if a user was able to reuse an earlier used username, they could get access to any chat message sent to the previous user with this username. The issue was patched in versions 11.2.2 and 11.3.0. As a workaround, don\u0027t allow users to choose usernames themselves. This is the default behaviour of Nextcloud, but some user providers may allow doing so.",
      "id": "GSD-2021-32689",
      "modified": "2023-12-13T01:23:09.026733Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-32689",
        "STATE": "PUBLIC",
        "TITLE": "Nextcloud Talk not properly disassociating users from chats after account deletion"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "security-advisories",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "\u003c 11.2.2"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "nextcloud"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "Nextcloud Talk is a fully on-premises audio/video and chat communication service. In versions prior to 11.2.2, if a user was able to reuse an earlier used username, they could get access to any chat message sent to the previous user with this username. The issue was patched in versions 11.2.2 and 11.3.0. As a workaround, don\u0027t allow users to choose usernames themselves. This is the default behaviour of Nextcloud, but some user providers may allow doing so."
          }
        ]
      },
      "impact": {
        "cvss": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-708: Incorrect Ownership Assignment"
              }
            ]
          },
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-344w-895c",
            "refsource": "CONFIRM",
            "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-344w-895c"
          },
          {
            "name": "https://github.com/nextcloud/spreed/pull/5633",
            "refsource": "MISC",
            "url": "https://github.com/nextcloud/spreed/pull/5633"
          },
          {
            "name": "https://hackerone.com/reports/1200700",
            "refsource": "MISC",
            "url": "https://hackerone.com/reports/1200700"
          },
          {
            "name": "https://github.com/nextcloud/spreed/releases/tag/v11.2.2",
            "refsource": "MISC",
            "url": "https://github.com/nextcloud/spreed/releases/tag/v11.2.2"
          },
          {
            "name": "https://github.com/nextcloud/spreed/releases/tag/v11.3.0",
            "refsource": "MISC",
            "url": "https://github.com/nextcloud/spreed/releases/tag/v11.3.0"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-xv6f-344w-895c",
        "discovery": "UNKNOWN"
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "11.2.2",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2021-32689"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "Nextcloud Talk is a fully on-premises audio/video and chat communication service. In versions prior to 11.2.2, if a user was able to reuse an earlier used username, they could get access to any chat message sent to the previous user with this username. The issue was patched in versions 11.2.2 and 11.3.0. As a workaround, don\u0027t allow users to choose usernames themselves. This is the default behaviour of Nextcloud, but some user providers may allow doing so."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "NVD-CWE-Other"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/nextcloud/spreed/pull/5633",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/nextcloud/spreed/pull/5633"
            },
            {
              "name": "https://hackerone.com/reports/1200700",
              "refsource": "MISC",
              "tags": [
                "Permissions Required"
              ],
              "url": "https://hackerone.com/reports/1200700"
            },
            {
              "name": "https://github.com/nextcloud/spreed/releases/tag/v11.3.0",
              "refsource": "MISC",
              "tags": [
                "Release Notes",
                "Third Party Advisory"
              ],
              "url": "https://github.com/nextcloud/spreed/releases/tag/v11.3.0"
            },
            {
              "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-344w-895c",
              "refsource": "CONFIRM",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-344w-895c"
            },
            {
              "name": "https://github.com/nextcloud/spreed/releases/tag/v11.2.2",
              "refsource": "MISC",
              "tags": [
                "Release Notes",
                "Third Party Advisory"
              ],
              "url": "https://github.com/nextcloud/spreed/releases/tag/v11.2.2"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "NONE",
            "baseScore": 4.0,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 8.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2022-07-02T19:58Z",
      "publishedDate": "2021-07-12T19:15Z"
    }
  }
}


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