GSD-2021-32689

Vulnerability from gsd - Updated: 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
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{
  "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": {
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        "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": {
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            {
              "product": {
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                  {
                    "product_name": "security-advisories",
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                          "version_value": "\u003c 11.2.2"
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          }
        ]
      },
      "impact": {
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          "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": {
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            "description": [
              {
                "lang": "eng",
                "value": "CWE-708: Incorrect Ownership Assignment"
              }
            ]
          },
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor"
              }
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          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-344w-895c",
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          },
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            "refsource": "MISC",
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            "name": "https://hackerone.com/reports/1200700",
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            "url": "https://hackerone.com/reports/1200700"
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          {
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            "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": {
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        "nodes": [
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            "children": [],
            "cpe_match": [
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                "cpe23Uri": "cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "11.2.2",
                "vulnerable": true
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        "description": {
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            }
          ]
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        "references": {
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            {
              "name": "https://github.com/nextcloud/spreed/pull/5633",
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              "tags": [
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              "url": "https://github.com/nextcloud/spreed/pull/5633"
            },
            {
              "name": "https://hackerone.com/reports/1200700",
              "refsource": "MISC",
              "tags": [
                "Permissions Required"
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            },
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              ],
              "url": "https://github.com/nextcloud/spreed/releases/tag/v11.2.2"
            }
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        }
      },
      "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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  • 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.