| Name | CVE-2016-9243 |
| Description | HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| python-cryptography (PTS) | jessie | 0.6.1-1+deb8u1 | fixed |
| stretch | 1.7.1-3+deb9u2 | fixed |
| buster, buster (lts) | 2.6.1-3+deb10u5 | fixed |
| buster (security) | 2.6.1-3+deb10u4 | fixed |
| bullseye | 3.3.2-1 | fixed |
| bullseye (security) | 3.3.2-1+deb11u1 | fixed |
| bookworm | 38.0.4-3+deb12u1 | fixed |
| bookworm (security) | 38.0.4-3~deb12u1 | fixed |
| sid, trixie | 43.0.0-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
Upstream bug: https://github.com/pyca/cryptography/issues/3211
Upstream commit: https://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874
https://www.openwall.com/lists/oss-security/2016/11/08/6