PT-2016-7715 · Python Cryptography Authority+2 · Cryptography+2

Burgerdevo · Published 2016-11-09 · Updated 2024-09-18 · CVE-2016-9243

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions cryptography versions prior to 1.5.3

Description The issue arises when HKDF in cryptography is used with a length less than algorithm.digest size, resulting in an empty byte-string being returned.

Recommendations For versions prior to 1.5.3, update to version 1.5.3 or later to resolve the issue.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

ALT-PU-2016-3252

ALT-PU-2023-8071

ALT-PU-2024-9926

CVE-2016-9243

GHSA-Q3CJ-2R34-2CWC

MGASA-2016-0377

PYSEC-2017-8

USN-3138-1

Affected Products

Alt Linux

Ubuntu

Cryptography

References · 33

• https://github.com/pyca/cryptography/commit/b924696b2e8731f39696584d12cceeb3aeb2d874 · Patch
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-9243 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2016-9243 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2016-9243 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/WQ5G7KHKZC4SI23JE7277KZXM57GEQKT · Vendor Advisory
• https://osv.dev/vulnerability/USN-3138-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2016-9243 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/5R2ZOBMPWDFFHUZ6QOZZY36A6H5CGJXL · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2016-0377 · Vendor Advisory
• http://openwall.com/lists/oss-security/2016/11/09/2 · Patch
• https://ubuntu.com/security/notices/USN-3138-1 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2016-0377.html · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U23KDR2M2N7W2ZSREG63BVW7D4VC6CIZ · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2016-9243 · Security Note