HKDF in cryptography before 1.5.3 returns an empty byte-string if used with a length less than algorithm.digest_size.
www.openwall.com/lists/oss-security/2016/11/09/2
www.securityfocus.com/bid/94216
www.ubuntu.com/usn/USN-3138-1
cryptography.io/en/latest/changelog
cryptography.io/en/latest/changelog/#v1-5-3
github.com/advisories/GHSA-q3cj-2r34-2cwc
github.com/pyca/cryptography
github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874
github.com/pyca/cryptography/issues/3211
github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2017-8.yaml
lists.fedoraproject.org/archives/list/[email protected]/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL
lists.fedoraproject.org/archives/list/[email protected]/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ
lists.fedoraproject.org/archives/list/[email protected]/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT
nvd.nist.gov/vuln/detail/CVE-2016-9243