USN-5199-1

It was discovered that the urllib.request.AbstractBasicAuthHandler class in Python contains regex with a quadratic worst-case time complexity. Specially crafted traffic from a malicious HTTP server could cause a regular expression denial of service (ReDoS) condition for a client. (CVE-2021-3733)

It was discovered that the Python urllib http client could enter into an infinite loop when incorrectly handling certain server responses (100 Continue response). Specially crafted traffic from a malicious HTTP server could cause a denial of service (DoS) condition for a client. (CVE-2021-3737)

References

Affected packages

Ubuntu:18.04:LTS / python3.6

Package

Name: python3.6
Purl: pkg:deb/ubuntu/python3.6@3.6.9-1~18.04ubuntu1.6?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.6.9-1~18.04ubuntu1.6

Affected versions

3.*

3.6.3-1ubuntu1

3.6.4~rc1-1

3.6.4~rc1-2

3.6.4-1

3.6.4-2

3.6.4-3build1

3.6.4-4

3.6.5~rc1-1

3.6.5-3

3.6.6-1~18.04

3.6.7-1~18.04

3.6.8-1~18.04.1

3.6.8-1~18.04.2

3.6.8-1~18.04.3

3.6.9-1~18.04

3.6.9-1~18.04ubuntu1

3.6.9-1~18.04ubuntu1.1

3.6.9-1~18.04ubuntu1.3

3.6.9-1~18.04ubuntu1.4

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "3.6.9-1~18.04ubuntu1.6",
            "binary_name": "idle-python3.6"
        },
        {
            "binary_version": "3.6.9-1~18.04ubuntu1.6",
            "binary_name": "libpython3.6"
        },
        {
            "binary_version": "3.6.9-1~18.04ubuntu1.6",
            "binary_name": "libpython3.6-dev"
        },
        {
            "binary_version": "3.6.9-1~18.04ubuntu1.6",
            "binary_name": "libpython3.6-minimal"
        },
        {
            "binary_version": "3.6.9-1~18.04ubuntu1.6",
            "binary_name": "libpython3.6-stdlib"
        },
        {
            "binary_version": "3.6.9-1~18.04ubuntu1.6",
            "binary_name": "libpython3.6-testsuite"
        },
        {
            "binary_version": "3.6.9-1~18.04ubuntu1.6",
            "binary_name": "python3.6"
        },
        {
            "binary_version": "3.6.9-1~18.04ubuntu1.6",
            "binary_name": "python3.6-dev"
        },
        {
            "binary_version": "3.6.9-1~18.04ubuntu1.6",
            "binary_name": "python3.6-examples"
        },
        {
            "binary_version": "3.6.9-1~18.04ubuntu1.6",
            "binary_name": "python3.6-minimal"
        },
        {
            "binary_version": "3.6.9-1~18.04ubuntu1.6",
            "binary_name": "python3.6-venv"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2021-3733"
        },
        {
            "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": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2021-3737"
        }
    ],
    "ecosystem": "Ubuntu:18.04:LTS"
}