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CVE-2016-9243

Good to know:

Date: March 27, 2017

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

Language: Python

Severity Score

7.5

Related Resources (25)

Url: https://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ/

Url: https://cryptography.io/en/latest/changelog

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT/

Url: http://www.securityfocus.com/bid/94216

Url: https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2017-8.yaml

Url: https://security-tracker.debian.org/tracker/CVE-2016-9243

Url: https://github.com/pyca/cryptography

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ

Url: https://nvd.nist.gov/vuln/detail/CVE-2016-9243

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL

Url: https://github.com/pyca/cryptography/issues/3211

Url: https://cryptography.io/en/latest/changelog/#v1-5-3

Url: http://www.ubuntu.com/usn/USN-3138-1

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT

Url: https://github.com/advisories/GHSA-q3cj-2r34-2cwc

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT/

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL/

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ/

Url: http://www.openwall.com/lists/oss-security/2016/11/09/2

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL/

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ

Url: https://www.mend.io/vulnerability-database/CVE-2016-9243

Severity Score

7.5

Weakness Type (CWE)

Improper Input Validation

CWE-20

Top Fix

Upgrade Version

Upgrade to version cryptography - 1.5.3

CVSS v3.1

Base Score:	7.5
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

CVSS v2

Base Score:	5.0
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	PARTIAL
Availability (A):	NONE
Additional information:

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