CVE-2016-9243

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2016-9243
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-03-27 17:59:00 UTC
Updated2023-11-07 02:36:00 UTC
DescriptionHKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.

Risk And Classification

Problem Types: CWE-20

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Canonical Ubuntu Linux 16.04 All All All
Operating System Canonical Ubuntu Linux 16.10 All All All
Operating System Canonical Ubuntu Linux 16.04 All All All
Operating System Canonical Ubuntu Linux 16.10 All All All
Application Cryptography.io Cryptography All All All All
Operating System Fedoraproject Fedora 23 All All All
Operating System Fedoraproject Fedora 24 All All All
Operating System Fedoraproject Fedora 25 All All All
Operating System Fedoraproject Fedora 23 All All All
Operating System Fedoraproject Fedora 24 All All All
Operating System Fedoraproject Fedora 25 All All All

References

ReferenceSourceLinkTags
Python Cryptography CVE-2016-9243 Security Bypass Vulnerability BID www.securityfocus.com Third Party Advisory, VDB Entry
[SECURITY] Fedora 24 Update: python-cryptography-1.5.3-3.fc24 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org Third Party Advisory
[SECURITY] Fedora 25 Update: python-cryptography-vectors-1.5.3-1.fc25 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org Third Party Advisory
Fixes #3211 -- fixed hkdf's output with short length (#3215) · pyca/cryptography@b924696 · GitHub CONFIRM github.com Patch, Third Party Advisory
[SECURITY] Fedora 23 Update: python-cryptography-vectors-1.5.3-1.fc23 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org Third Party Advisory
USN-3138-1: python-cryptography vulnerability | Ubuntu UBUNTU www.ubuntu.com Third Party Advisory
[SECURITY] Fedora 24 Update: python-cryptography-1.5.3-3.fc24 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
Changelog — Cryptography 2.1.dev1 documentation CONFIRM cryptography.io Release Notes, Third Party Advisory
HKDF key-length inconsistency · Issue #3211 · pyca/cryptography · GitHub CONFIRM github.com Third Party Advisory
oss-security - Re: CVE Request: Cryptography 1.5.3: HKDF might return an empty byte-string MLIST www.openwall.com Mailing List, Patch, VDB Entry
[SECURITY] Fedora 25 Update: python-cryptography-vectors-1.5.3-1.fc25 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 23 Update: python-cryptography-vectors-1.5.3-1.fc23 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 670239 EulerOS Security Update for python-cryptography (EulerOS-SA-2021-1837)
  • 670669 EulerOS Security Update for python-cryptography (EulerOS-SA-2021-2428)
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report