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.

Score

CVSS 3.1 7.5 High

Status

Modified - secalert@redhat.com

Published

2017-03-27

Last modified

2024-08-06

Affected products

• Ubuntu Linux (Canonical)
• Cryptography (Cryptography.io)
• Fedora (Fedoraproject)

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/5R2ZOBMPWDFFHUZ6QOZZY3…
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BV…
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277K…