{"id":"CVE-2016-9243","state":"PUBLISHED","title":"HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.","description":"HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.","publishedAt":"2017-03-27T17:00:00.000Z","updatedAt":"2024-08-06T02:42:11.253Z","severity":null,"assigner":"redhat","products":["n/a n/a"],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":["https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ/","http://www.ubuntu.com/usn/USN-3138-1","https://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT/","http://www.securityfocus.com/bid/94216","http://www.openwall.com/lists/oss-security/2016/11/09/2","https://cryptography.io/en/latest/changelog","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL/","https://github.com/pyca/cryptography/issues/3211"],"weaknesses":[],"ingestedAt":"2026-10-29T19:42:58.401Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2016/9xxx/CVE-2016-9243.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2016-9243","state":"PUBLISHED","datePublished":"2017-03-27T17:00:00.000Z","dateUpdated":"2024-08-06T02:42:11.253Z","assignerShortName":"redhat","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateReserved":"2016-11-09T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size."}],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":[{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ/","name":"FEDORA-2016-2d90e27e50","tags":["vendor-advisory","x_refsource_FEDORA"]},{"url":"http://www.ubuntu.com/usn/USN-3138-1","name":"USN-3138-1","tags":["vendor-advisory","x_refsource_UBUNTU"]},{"url":"https://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874","tags":["x_refsource_CONFIRM"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT/","name":"FEDORA-2016-d3a2b640ce","tags":["vendor-advisory","x_refsource_FEDORA"]},{"url":"http://www.securityfocus.com/bid/94216","name":"94216","tags":["vdb-entry","x_refsource_BID"]},{"url":"http://www.openwall.com/lists/oss-security/2016/11/09/2","name":"[oss-security] 20161109 Re: CVE Request: Cryptography 1.5.3: HKDF might return an empty byte-string","tags":["mailing-list","x_refsource_MLIST"]},{"url":"https://cryptography.io/en/latest/changelog","tags":["x_refsource_CONFIRM"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL/","name":"FEDORA-2016-e77c8c1f3b","tags":["vendor-advisory","x_refsource_FEDORA"]},{"url":"https://github.com/pyca/cryptography/issues/3211","tags":["x_refsource_CONFIRM"]}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"redhat","dateUpdated":"2017-10-25T17:57:01.000Z","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749"},"datePublic":"2016-11-01T00:00:00.000Z","x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"secalert@redhat.com","ID":"CVE-2016-9243","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":"HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"FEDORA-2016-2d90e27e50","refsource":"FEDORA","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ/"},{"name":"USN-3138-1","refsource":"UBUNTU","url":"http://www.ubuntu.com/usn/USN-3138-1"},{"name":"https://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874","refsource":"CONFIRM","url":"https://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874"},{"name":"FEDORA-2016-d3a2b640ce","refsource":"FEDORA","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT/"},{"name":"94216","refsource":"BID","url":"http://www.securityfocus.com/bid/94216"},{"name":"[oss-security] 20161109 Re: CVE Request: Cryptography 1.5.3: HKDF might return an empty byte-string","refsource":"MLIST","url":"http://www.openwall.com/lists/oss-security/2016/11/09/2"},{"name":"https://cryptography.io/en/latest/changelog","refsource":"CONFIRM","url":"https://cryptography.io/en/latest/changelog"},{"name":"FEDORA-2016-e77c8c1f3b","refsource":"FEDORA","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL/"},{"name":"https://github.com/pyca/cryptography/issues/3211","refsource":"CONFIRM","url":"https://github.com/pyca/cryptography/issues/3211"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ/","name":"FEDORA-2016-2d90e27e50","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"]},{"url":"http://www.ubuntu.com/usn/USN-3138-1","name":"USN-3138-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred"]},{"url":"https://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT/","name":"FEDORA-2016-d3a2b640ce","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"]},{"url":"http://www.securityfocus.com/bid/94216","name":"94216","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2016/11/09/2","name":"[oss-security] 20161109 Re: CVE Request: Cryptography 1.5.3: HKDF might return an empty byte-string","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://cryptography.io/en/latest/changelog","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL/","name":"FEDORA-2016-e77c8c1f3b","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"]},{"url":"https://github.com/pyca/cryptography/issues/3211","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-06T02:42:11.253Z"}}]}}}