CVE-2016-9243

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

27/03/2017

Last modified:

20/04/2025

Description

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

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): High
Availability (A): None

Base Score 3.x

7.50

Severity 3.x

HIGH

Vector 2.0

AV:N/AC:L/Au:N/C:N/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): Physical
Availability (A): None

Base Score 2.0

5.00

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:cryptography.io:cryptography::::::python::*		1.5.2 (including)
cpe:2.3:o:fedoraproject:fedora:23:::::::*
cpe:2.3:o:fedoraproject:fedora:24:::::::*
cpe:2.3:o:fedoraproject:fedora:25:::::::*
cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:16.10:::::::*

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:a:cryptography.io:cryptography::::::python::*		1.5.2 (including)
cpe:2.3:o:fedoraproject:fedora:23:::::::*
cpe:2.3:o:fedoraproject:fedora:24:::::::*
cpe:2.3:o:fedoraproject:fedora:25:::::::*
cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:16.10:::::::*

CVE-2016-9243

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools