{"action":"Upgrade cryptography to 1.5.3 or later.","affected":[{"fixed":"1.5.3","introduced":"0"}],"component":"cryptography","cve_ids":["CVE-2016-9243"],"ecosystem":"PyPI","epss":0.03464,"exploited":false,"fixed_versions":["1.5.3"],"ghsa_id":"GHSA-q3cj-2r34-2cwc","id":"tcs_01M5KG7H2DBY8Q4ARHEZ6443G0","modified_at":"2023-11-08T03:58:38.234221Z","published_at":"2017-03-27T17:59:00Z","references":["https://osv.dev/vulnerability/PYSEC-2017-8","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT/","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ/","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL/","https://github.com/pyca/cryptography/issues/3211","https://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874","https://cryptography.io/en/latest/changelog","http://www.ubuntu.com/usn/USN-3138-1","http://www.securityfocus.com/bid/94216","http://www.openwall.com/lists/oss-security/2016/11/09/2","https://github.com/advisories/GHSA-q3cj-2r34-2cwc"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"PYSEC-2017-8","url":"https://osv.dev/vulnerability/PYSEC-2017-8"}],"summary":"HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size."}