{"id":"CVE-2021-45884","state":"PUBLISHED","title":"In Brave Desktop 1.17 through 1.33 before 1.33.106, when CNAME-based adblocking and a proxying extension with a SOCKS fallback are enabled, additional DNS requests are issued outsi","description":"In Brave Desktop 1.17 through 1.33 before 1.33.106, when CNAME-based adblocking and a proxying extension with a SOCKS fallback are enabled, additional DNS requests are issued outside of the proxying extension using the system's DNS settings, resulting in information disclosure. NOTE: this issue exists because of an incomplete fix for CVE-2021-21323 and CVE-2021-22916.","publishedAt":"2021-12-27T21:31:48.000Z","updatedAt":"2024-08-04T04:54:30.857Z","severity":null,"assigner":"mitre","products":["n/a n/a"],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":["https://github.com/brave/brave-core/pull/10742","https://github.com/brave/brave-browser/issues/19070","https://github.com/brave/brave-browser/issues/20079","https://hackerone.com/reports/1377864"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:13.309Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/45xxx/CVE-2021-45884.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-45884","state":"PUBLISHED","datePublished":"2021-12-27T21:31:48.000Z","dateUpdated":"2024-08-04T04:54:30.857Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2021-12-27T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"In Brave Desktop 1.17 through 1.33 before 1.33.106, when CNAME-based adblocking and a proxying extension with a SOCKS fallback are enabled, additional DNS requests are issued outside of the proxying extension using the system's DNS settings, resulting in information disclosure. NOTE: this issue exists because of an incomplete fix for CVE-2021-21323 and CVE-2021-22916."}],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":[{"url":"https://github.com/brave/brave-core/pull/10742","tags":["x_refsource_MISC"]},{"url":"https://github.com/brave/brave-browser/issues/19070","tags":["x_refsource_MISC"]},{"url":"https://github.com/brave/brave-browser/issues/20079","tags":["x_refsource_MISC"]},{"url":"https://hackerone.com/reports/1377864","tags":["x_refsource_MISC"]}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"mitre","dateUpdated":"2021-12-27T21:31:48.000Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2021-45884","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"In Brave Desktop 1.17 through 1.33 before 1.33.106, when CNAME-based adblocking and a proxying extension with a SOCKS fallback are enabled, additional DNS requests are issued outside of the proxying extension using the system's DNS settings, resulting in information disclosure. NOTE: this issue exists because of an incomplete fix for CVE-2021-21323 and CVE-2021-22916."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"https://github.com/brave/brave-core/pull/10742","refsource":"MISC","url":"https://github.com/brave/brave-core/pull/10742"},{"name":"https://github.com/brave/brave-browser/issues/19070","refsource":"MISC","url":"https://github.com/brave/brave-browser/issues/19070"},{"name":"https://github.com/brave/brave-browser/issues/20079","refsource":"MISC","url":"https://github.com/brave/brave-browser/issues/20079"},{"name":"https://hackerone.com/reports/1377864","refsource":"MISC","url":"https://hackerone.com/reports/1377864"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/brave/brave-core/pull/10742","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://github.com/brave/brave-browser/issues/19070","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://github.com/brave/brave-browser/issues/20079","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://hackerone.com/reports/1377864","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T04:54:30.857Z"}}]}}}