UBUNTU-CVE-2016-9243

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Source
https://ubuntu.com/security/CVE-2016-9243
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-9243.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2016-9243
Upstream
Downstream
Related
Published
2016-11-09T00:00:00Z
Modified
2025-09-08T16:43:56Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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

References

Affected packages

Ubuntu:16.04:LTS / python-cryptography

Package

Name
python-cryptography
Purl
pkg:deb/ubuntu/python-cryptography@1.2.3-1ubuntu0.1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.2.3-1ubuntu0.1

Affected versions

1.*

1.0.1-1ubuntu1
1.0.2-1
1.1-1
1.1.1-1
1.1.1-1ubuntu1
1.1.1-1ubuntu2
1.1.1-1ubuntu3
1.2.2-2
1.2.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.2.3-1ubuntu0.1",
            "binary_name": "python-cryptography"
        },
        {
            "binary_version": "1.2.3-1ubuntu0.1",
            "binary_name": "python3-cryptography"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-9243.json"