CVEvulnerability

CVE-2016-9243

7.5 HIGH Published 2017-03-27 Modified 2026-06-17 Official page ↗

Status: Modified
Published: 2017-03-27
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0 ([email protected]): 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N

Description

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

Affected configurations

• cryptography.io cryptography (<= 1.5.2) • fedoraproject fedora 23 • fedoraproject fedora 24 • fedoraproject fedora 25 • canonical ubuntu linux 16.04 • canonical ubuntu linux 16.10

References

http://www.openwall.com/lists/oss-security/2016/11/09/2 Mailing List, Patch, VDB Entry
http://www.securityfocus.com/bid/94216 Broken Link, Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-3138-1 Third Party Advisory
https://cryptography.io/en/latest/changelog Release Notes, Third Party Advisory
https://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874 Patch, Third Party Advisory
https://github.com/pyca/cryptography/issues/3211 Issue Tracking, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL/ Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ/ Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT/ Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/11/09/2 Mailing List, Patch, VDB Entry
http://www.securityfocus.com/bid/94216 Broken Link, Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-3138-1 Third Party Advisory
https://cryptography.io/en/latest/changelog Release Notes, Third Party Advisory
https://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874 Patch, Third Party Advisory
https://github.com/pyca/cryptography/issues/3211 Issue Tracking, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL/ Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ/ Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT/ Mailing List, Third Party Advisory