{"id":"CVE-2021-45100","state":"PUBLISHED","title":"The ksmbd server through 3.4.2, as used in the Linux kernel through 5.15.8, sometimes communicates in cleartext even though encryption has been enabled. This occurs because it sets","description":"The ksmbd server through 3.4.2, as used in the Linux kernel through 5.15.8, sometimes communicates in cleartext even though encryption has been enabled. This occurs because it sets the SMB2_GLOBAL_CAP_ENCRYPTION flag when using the SMB 3.1.1 protocol, which is a violation of the SMB protocol specification. When Windows 10 detects this protocol violation, it disables encryption.","publishedAt":"2021-12-16T04:37:02.000Z","updatedAt":"2024-08-04T04:32:13.649Z","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/cifsd-team/ksmbd/issues/550","https://github.com/cifsd-team/ksmbd/pull/551","https://marc.info/?l=linux-kernel&m=163961726017023&w=2","https://security.netapp.com/advisory/ntap-20220107-0001/"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:13.309Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/45xxx/CVE-2021-45100.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-45100","state":"PUBLISHED","datePublished":"2021-12-16T04:37:02.000Z","dateUpdated":"2024-08-04T04:32:13.649Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2021-12-16T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"The ksmbd server through 3.4.2, as used in the Linux kernel through 5.15.8, sometimes communicates in cleartext even though encryption has been enabled. This occurs because it sets the SMB2_GLOBAL_CAP_ENCRYPTION flag when using the SMB 3.1.1 protocol, which is a violation of the SMB protocol specification. When Windows 10 detects this protocol violation, it disables encryption."}],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":[{"url":"https://github.com/cifsd-team/ksmbd/issues/550","tags":["x_refsource_MISC"]},{"url":"https://github.com/cifsd-team/ksmbd/pull/551","tags":["x_refsource_MISC"]},{"url":"https://marc.info/?l=linux-kernel&m=163961726017023&w=2","tags":["x_refsource_MISC"]},{"url":"https://security.netapp.com/advisory/ntap-20220107-0001/","tags":["x_refsource_CONFIRM"]}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"mitre","dateUpdated":"2022-01-07T12:06:18.000Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2021-45100","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":"The ksmbd server through 3.4.2, as used in the Linux kernel through 5.15.8, sometimes communicates in cleartext even though encryption has been enabled. This occurs because it sets the SMB2_GLOBAL_CAP_ENCRYPTION flag when using the SMB 3.1.1 protocol, which is a violation of the SMB protocol specification. When Windows 10 detects this protocol violation, it disables encryption."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"https://github.com/cifsd-team/ksmbd/issues/550","refsource":"MISC","url":"https://github.com/cifsd-team/ksmbd/issues/550"},{"name":"https://github.com/cifsd-team/ksmbd/pull/551","refsource":"MISC","url":"https://github.com/cifsd-team/ksmbd/pull/551"},{"name":"https://marc.info/?l=linux-kernel&m=163961726017023&w=2","refsource":"MISC","url":"https://marc.info/?l=linux-kernel&m=163961726017023&w=2"},{"name":"https://security.netapp.com/advisory/ntap-20220107-0001/","refsource":"CONFIRM","url":"https://security.netapp.com/advisory/ntap-20220107-0001/"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/cifsd-team/ksmbd/issues/550","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://github.com/cifsd-team/ksmbd/pull/551","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://marc.info/?l=linux-kernel&m=163961726017023&w=2","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://security.netapp.com/advisory/ntap-20220107-0001/","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T04:32:13.649Z"}}]}}}