CVE-2016-9243

NameCVE-2016-9243
DescriptionHKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.
SourceCVE (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 PackageReleaseVersionStatus
python-cryptography (PTS)buster2.6.1-3+deb10u2fixed
buster (security)2.6.1-3+deb10u4fixed
bullseye3.3.2-1fixed
bookworm38.0.4-3fixed
bookworm (security)38.0.4-3~deb12u1fixed
trixie41.0.7-4fixed
sid42.0.5-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python-cryptographysourcejessie0.6.1-1+deb8u1
python-cryptographysource(unstable)1.5.3-1

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

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