USN-3138-1

Markus Döring discovered that python-cryptography incorrectly handled certain HKDF lengths. This could result in python-cryptography returning an empty string instead of the expected derived key.

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

0 Unknown 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

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

Database specific

cves_map

{
    "cves":  [
        {
            "id":  "CVE-2016-9243",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:16.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3138-1.json"