Vulnerability in Cryptography.io Cryptography
CVE-2016-9243
HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.
EPSS: 0.017 (82.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Cryptography.io Cryptography
- Canonical Ubuntu_linux — versions 16.04, 16.10
- Fedoraproject Fedora — versions 23, 24, 25
- N/a — versions n/a
Public proof-of-concept exploits
References
- secalert@redhat.com (vendor-advisory, x_refsource_FEDORA, Mailing List, Third Party Advisory)
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
- secalert@redhat.com (vendor-advisory, x_refsource_FEDORA, Mailing List, Third Party Advisory)
- secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry, Broken Link, x_refsource_BID)
- secalert@redhat.com (mailing-list, x_refsource_MLIST, Patch, Mailing List, VDB Entry)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory, Release Notes)
- secalert@redhat.com (vendor-advisory, x_refsource_FEDORA, Mailing List, Third Party Advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2016-9243?
- CVE-2016-9243 is a high-severity vulnerability in Cryptography.io Cryptography. CVSS score: 7.5/10. Published 2017-03-27.
- How severe is CVE-2016-9243?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-9243 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.