GSD-2023-2754

Vulnerability from gsd - Updated: 2023-12-13 01:20
Details
The Cloudflare WARP client for Windows assigns loopback IPv4 addresses for the DNS Servers, since WARP acts as local DNS server that performs DNS queries in a secure manner, however, if a user is connected to WARP over an IPv6-capable network, te WARP client did not assign loopback IPv6 addresses but Unique Local Addresses, which under certain conditions could point towards unknown devices in the same local network which enables an Attacker to view DNS queries made by the device.
Aliases
Aliases
CVE-2023-2754
To clipboard 

{
  "GSD": {
    "alias": "CVE-2023-2754",
    "id": "GSD-2023-2754"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-2754"
      ],
      "details": "The Cloudflare WARP client for Windows assigns loopback IPv4 addresses for the DNS Servers, since WARP acts as local DNS server that performs DNS queries in a secure manner, however, if a user is connected to WARP over an IPv6-capable network, te WARP client did not assign loopback IPv6 addresses but Unique Local Addresses, which under certain conditions could point towards unknown devices in the same local network which enables an Attacker to view DNS queries made by the device.\n\n\n",
      "id": "GSD-2023-2754",
      "modified": "2023-12-13T01:20:32.261168Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
        "ASSIGNER": "cna@cloudflare.com",
        "ID": "CVE-2023-2754",
        "STATE": "PUBLIC"
      },
      "affects": {
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          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "WARP",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "affected",
                            "versions": [
                              {
                                "changes": [
                                  {
                                    "at": "2023.7.160.0",
                                    "status": "unaffected"
                                  }
                                ],
                                "lessThan": "2023.7.160.0",
                                "status": "affected",
                                "version": "0",
                                "versionType": "release"
                              }
                            ]
                          }
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Cloudflare"
            }
          ]
        }
      },
      "configuration": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eThe victim\u0027s device would need to be connected to a rogue Wi-Fi network, that announces support for IPv6, and assigns itself the same IPv6 address that WARP Client sets the IPv6 DNS server as.\u003c/span\u003e\u003cbr\u003e\u003cbr\u003e"
            }
          ],
          "value": "The victim\u0027s device would need to be connected to a rogue Wi-Fi network, that announces support for IPv6, and assigns itself the same IPv6 address that WARP Client sets the IPv6 DNS server as.\n\n"
        }
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            "value": "The Cloudflare WARP client for Windows assigns loopback IPv4 addresses for the DNS Servers, since WARP acts as local DNS server that performs DNS queries in a secure manner, however, if a user is connected to WARP over an IPv6-capable network, te WARP client did not assign loopback IPv6 addresses but Unique Local Addresses, which under certain conditions could point towards unknown devices in the same local network which enables an Attacker to view DNS queries made by the device.\n\n\n"
          }
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      },
      "impact": {
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            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
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            "confidentialityImpact": "HIGH",
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            "version": "3.1"
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              {
                "cweId": "CWE-319",
                "lang": "eng",
                "value": "CWE-319 Cleartext Transmission of Sensitive Information"
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      "references": {
        "reference_data": [
          {
            "name": "https://install.appcenter.ms/orgs/cloudflare/apps/1.1.1.1-windows-1/distribution_groups/release",
            "refsource": "MISC",
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            "url": "https://developers.cloudflare.com/warp-client/"
          }
        ]
      },
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              "type": "text/html",
              "value": "Users are encouraged to update to the latest WARP Client (Windows) version available:\u0026nbsp;2023.7.160.0"
            }
          ],
          "value": "Users are encouraged to update to the latest WARP Client (Windows) version available:\u00a02023.7.160.0"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
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          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eDisabling IPv6 support in local devices\u003c/span\u003e\u003cbr\u003e"
            }
          ],
          "value": "Disabling IPv6 support in local devices\n"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
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            "children": [],
            "cpe_match": [
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                "cpe23Uri": "cpe:2.3:a:cloudflare:warp:*:*:*:*:*:windows:*:*",
                "cpe_name": [],
                "versionEndExcluding": "2023.7.160.0",
                "vulnerable": true
              }
            ],
            "operator": "OR"
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          "ID": "CVE-2023-2754"
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            {
              "name": "https://install.appcenter.ms/orgs/cloudflare/apps/1.1.1.1-windows-1/distribution_groups/release",
              "refsource": "MISC",
              "tags": [
                "Release Notes"
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              "url": "https://install.appcenter.ms/orgs/cloudflare/apps/1.1.1.1-windows-1/distribution_groups/release"
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            "attackVector": "ADJACENT_NETWORK",
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            "confidentialityImpact": "HIGH",
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            "version": "3.1"
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          "impactScore": 5.2
        }
      },
      "lastModifiedDate": "2023-08-09T21:04Z",
      "publishedDate": "2023-08-03T15:15Z"
    }
  }
}


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  • 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.
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