CVE-2016-9243
HIGH7.5EPSS 1.7%Improper input validation in cryptography
Published: 5/17/2022Modified: 4/28/2026
Description
HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.
Affected packages (3)
- Debian/python-cryptographyfrom 0, < 1.5.3-1
- PyPI/cryptographyfrom 0, < 1.5.3
- PyPI/cryptographyfrom 0, < b924696b2e8731f39696584d12cceeb3aeb2d874 | from 0, < 1.5.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
References (21)
- ADVISORYhttps://github.com/advisories/GHSA-q3cj-2r34-2cwc
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2016-9243
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2016-9243
- PATCHhttps://github.com/pyca/cryptography
- WEBhttps://cryptography.io/en/latest/changelog
- WEBhttps://cryptography.io/en/latest/changelog/#v1-5-3
- WEBhttps://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874
- WEBhttps://github.com/pyca/cryptography/issues/3211
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2017-8.yaml
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL/
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ/
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT/
- WEBhttp://www.openwall.com/lists/oss-security/2016/11/09/2
- WEBhttp://www.securityfocus.com/bid/94216
- WEBhttp://www.ubuntu.com/usn/USN-3138-1