USN-4196-1

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Source
https://ubuntu.com/security/notices/USN-4196-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4196-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-4196-1
Upstream
Related
Published
2019-11-18T12:42:01.043160Z
Modified
2025-10-13T04:34:59Z
Summary
python-ecdsa vulnerabilities
Details

It was discovered that python-ecdsa incorrectly handled certain signatures. A remote attacker could possibly use this issue to cause python-ecdsa to generate unexpected exceptions, resulting in a denial of service. (CVE-2019-14853)

It was discovered that python-ecdsa incorrectly verified DER encoding in signatures. A remote attacker could use this issue to perform certain malleability attacks. (CVE-2019-14859)

References

Affected packages

Ubuntu:16.04:LTS / python-ecdsa

Package

Name
python-ecdsa
Purl
pkg:deb/ubuntu/python-ecdsa@0.13-2ubuntu0.16.04.1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.13-2ubuntu0.16.04.1

Affected versions

0.*

0.13-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.13-2ubuntu0.16.04.1",
            "binary_name": "python-ecdsa"
        },
        {
            "binary_version": "0.13-2ubuntu0.16.04.1",
            "binary_name": "python3-ecdsa"
        }
    ],
    "availability": "No subscription required"
}

Database specific 

{
    "cves_map": {
        "cves": [
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "low",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2019-14853"
            },
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2019-14859"
            }
        ],
        "ecosystem": "Ubuntu:16.04:LTS"
    }
}

Ubuntu:18.04:LTS / python-ecdsa

Package

Name
python-ecdsa
Purl
pkg:deb/ubuntu/python-ecdsa@0.13-2ubuntu0.18.04.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.13-2ubuntu0.18.04.1

Affected versions

0.*

0.13-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.13-2ubuntu0.18.04.1",
            "binary_name": "python-ecdsa"
        },
        {
            "binary_version": "0.13-2ubuntu0.18.04.1",
            "binary_name": "python3-ecdsa"
        }
    ],
    "availability": "No subscription required"
}

Database specific 

{
    "cves_map": {
        "cves": [
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "low",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2019-14853"
            },
            {
                "severity": [
                    {
                        "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
                        "type": "CVSS_V3"
                    },
                    {
                        "score": "medium",
                        "type": "Ubuntu"
                    }
                ],
                "id": "CVE-2019-14859"
            }
        ],
        "ecosystem": "Ubuntu:18.04:LTS"
    }
}