CVE-2016-9243

CWE-327 — Broken Cryptographic AlgorithmCWE-20 — Improper Input Validation10 documents8 sources
Severity
7.5HIGH
EPSS
1.7%
top 17.99%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Cryptography.io CryptographyCanonical Ubuntu LinuxFedoraproject Fedora
Timeline
PublishedMar 27
Latest updateMay 17

Description

HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶PyPIcryptography< 1.5.3
▶Debianpython-cryptography< 1.5.3-1+3

Also affects: Fedora 23, 24, 25, Ubuntu Linux 16.04, 16.10

Patches

Patch: www.openwall.com ↗Patch: github.com ↗Patch: www.openwall.com ↗

🔴Vulnerability Details

4
OSV
Improper input validation in cryptography↗2022-05-17
▶
GHSA
Improper input validation in cryptography↗2022-05-17
▶
OSV
CVE-2016-9243: HKDF in cryptography before 1↗2017-03-27
▶
CVEList
CVE-2016-9243: HKDF in cryptography before 1↗2017-03-27
▶

📋Vendor Advisories

3
Ubuntu
python-cryptography vulnerability↗2016-11-28
▶
Red Hat
python-cryptography: HKDF might return an empty byte-string↗2016-11-05
▶
Debian
CVE-2016-9243: python-cryptography - HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a le...↗2016
▶

💬Community

2
Bugzilla
CVE-2016-9243 python-cryptography: HKDF might return an empty byte-string↗2016-11-09
▶
Bugzilla
CVE-2016-9243 python-cryptography: HKDF might return an empty byte-string [fedora-all]↗2016-11-09
▶