{"id":"CVE-2023-2754","state":"PUBLISHED","title":"Plaintext transmission of DNS requests in Windows 1.1.1.1 WARP client","description":"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","publishedAt":"2023-08-03T13:53:00.634Z","updatedAt":"2024-10-17T14:12:44.334Z","severity":{"score":7.4,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","source":"cloudflare"},"assigner":"cloudflare","products":["Cloudflare WARP"],"affected":[{"vendor":"Cloudflare","product":"WARP","packageName":"WARP Client","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThan":"2023.7.160.0","changes":[{"at":"2023.7.160.0","status":"unaffected"}],"versionType":"release"}],"modules":["Client"],"platforms":["Windows"]}],"references":["https://install.appcenter.ms/orgs/cloudflare/apps/1.1.1.1-windows-1/distribution_groups/release","https://github.com/cloudflare/advisories/security/advisories/GHSA-mv6g-7577-vq4w","https://developers.cloudflare.com/warp-client/"],"weaknesses":["CWE-319"],"ingestedAt":"2026-10-29T20:05:52.290Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/2xxx/CVE-2023-2754.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-2754","state":"PUBLISHED","datePublished":"2023-08-03T13:53:00.634Z","dateUpdated":"2024-10-17T14:12:44.334Z","assignerShortName":"cloudflare","assignerOrgId":"a22f1246-ba21-4bb4-a601-ad51614c1513","dateReserved":"2023-05-17T07:55:45.392Z"},"containers":{"cna":{"title":"Plaintext transmission of DNS requests in Windows 1.1.1.1 WARP client","descriptions":[{"lang":"en","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"}],"affected":[{"vendor":"Cloudflare","product":"WARP","packageName":"WARP Client","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThan":"2023.7.160.0","changes":[{"at":"2023.7.160.0","status":"unaffected"}],"versionType":"release"}],"modules":["Client"],"platforms":["Windows"]}],"references":[{"url":"https://install.appcenter.ms/orgs/cloudflare/apps/1.1.1.1-windows-1/distribution_groups/release","tags":["release-notes"]},{"url":"https://github.com/cloudflare/advisories/security/advisories/GHSA-mv6g-7577-vq4w","tags":["vendor-advisory"]},{"url":"https://developers.cloudflare.com/warp-client/","tags":["product"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-319","description":"CWE-319 Cleartext Transmission of Sensitive Information","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"cloudflare","orgId":"a22f1246-ba21-4bb4-a601-ad51614c1513","dateUpdated":"2023-08-03T13:53:00.634Z"},"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<span style=\"background-color: rgb(255, 255, 255);\">The victim's 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.</span><br><br>"}],"value":"The victim's 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"}],"credits":[{"lang":"en","type":"reporter","user":"00000000-0000-4000-9000-000000000000","value":"vanhoefm"}],"impacts":[{"capecId":"CAPEC-117","descriptions":[{"lang":"en","value":"CAPEC-117 Interception"}]}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Users are encouraged to update to the latest WARP Client (Windows) version available:&nbsp;2023.7.160.0"}],"value":"Users are encouraged to update to the latest WARP Client (Windows) version available: 2023.7.160.0"}],"source":{"discovery":"EXTERNAL"},"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<span style=\"background-color: rgb(255, 255, 255);\">Disabling IPv6 support in local devices</span><br>"}],"value":"Disabling IPv6 support in local devices\n"}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://install.appcenter.ms/orgs/cloudflare/apps/1.1.1.1-windows-1/distribution_groups/release","tags":["release-notes","x_transferred"]},{"url":"https://github.com/cloudflare/advisories/security/advisories/GHSA-mv6g-7577-vq4w","tags":["vendor-advisory","x_transferred"]},{"url":"https://developers.cloudflare.com/warp-client/","tags":["product","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T06:33:05.480Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-10-17T14:12:35.312663Z","id":"CVE-2023-2754","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-10-17T14:12:44.334Z"}}]}}}