CVE-2016-9243

HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
redhatCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 81%
VendorProductVersion
cryptography.iocryptography
𝑥
≤ 1.5.2
canonicalubuntu_linux
16.04
canonicalubuntu_linux
16.10
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
python-cryptography
bullseye
3.3.2-1
fixed
bullseye (security)
3.3.2-1+deb11u1
fixed
bookworm
38.0.4-3
fixed
bookworm (security)
38.0.4-3~deb12u1
fixed
sid
43.0.0-1
fixed
trixie
43.0.0-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
python-cryptography
yakkety
Fixed 1.5-2ubuntu0.1
released
xenial
Fixed 1.2.3-1ubuntu0.1
released
trusty
dne
precise
dne
References
http://www.openwall.com/lists/oss-security/2016/11/09/2
http://www.securityfocus.com/bid/94216
http://www.ubuntu.com/usn/USN-3138-1
https://cryptography.io/en/latest/changelog
https://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874
https://github.com/pyca/cryptography/issues/3211
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT/
http://www.openwall.com/lists/oss-security/2016/11/09/2
http://www.securityfocus.com/bid/94216
http://www.ubuntu.com/usn/USN-3138-1
https://cryptography.io/en/latest/changelog
https://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874
https://github.com/pyca/cryptography/issues/3211
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT/