FreeBSD : py-cryptography -- vulnerable HKDF key generation (e5dcb942-ba6f-11e6-b1cf-14dae9d210b8)

Medium Nessus Plugin ID 95515


The remote FreeBSD host is missing one or more security-related updates.


Alex Gaynor reports :

Fixed a bug where ``HKDF`` would return an empty byte-string if used with a ``length`` less than ``algorithm.digest_size``.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 95515

File Name: freebsd_pkg_e5dcb942ba6f11e6b1cf14dae9d210b8.nasl

Version: $Revision: 3.4 $

Type: local

Published: 2016/12/05

Modified: 2018/01/31

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N


Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:py27-cryptography, p-cpe:/a:freebsd:freebsd:py33-cryptography, p-cpe:/a:freebsd:freebsd:py34-cryptography, p-cpe:/a:freebsd:freebsd:py35-cryptography, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 2016/12/04

Vulnerability Publication Date: 2016/11/05

Reference Information

CVE: CVE-2016-9243