UBUNTU-CVE-2021-3737

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Source
https://ubuntu.com/security/CVE-2021-3737
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3737.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-3737
Upstream
Downstream
Related
Published
2021-08-31T00:00:00Z
Modified
2025-09-08T16:46:47Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.

References

Affected packages

Ubuntu:Pro:14.04:LTS / python3.4

Package

Name
python3.4
Purl
pkg:deb/ubuntu/python3.4@3.4.3-1ubuntu1~14.04.7+esm11?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.4.3-1ubuntu1~14.04.7+esm11

Affected versions

3.*

3.4~b1-0ubuntu3
3.4~b1-4ubuntu4
3.4~b1-4ubuntu6
3.4~b1-5ubuntu2
3.4~b2-1
3.4~b3-1ubuntu1
3.4~rc1-1build1
3.4~rc2-1
3.4~rc3-0ubuntu1
3.4.0-1
3.4.0-2ubuntu1
3.4.0-2ubuntu1.1
3.4.3-1ubuntu1~14.04.1
3.4.3-1ubuntu1~14.04.3
3.4.3-1ubuntu1~14.04.4
3.4.3-1ubuntu1~14.04.5
3.4.3-1ubuntu1~14.04.6
3.4.3-1ubuntu1~14.04.7
3.4.3-1ubuntu1~14.04.7+esm2
3.4.3-1ubuntu1~14.04.7+esm4
3.4.3-1ubuntu1~14.04.7+esm6
3.4.3-1ubuntu1~14.04.7+esm7
3.4.3-1ubuntu1~14.04.7+esm8
3.4.3-1ubuntu1~14.04.7+esm10

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "idle-python3.4",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm11"
        },
        {
            "binary_name": "libpython3.4",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm11"
        },
        {
            "binary_name": "libpython3.4-dev",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm11"
        },
        {
            "binary_name": "libpython3.4-minimal",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm11"
        },
        {
            "binary_name": "libpython3.4-stdlib",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm11"
        },
        {
            "binary_name": "libpython3.4-testsuite",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm11"
        },
        {
            "binary_name": "python3.4",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm11"
        },
        {
            "binary_name": "python3.4-dev",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm11"
        },
        {
            "binary_name": "python3.4-examples",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm11"
        },
        {
            "binary_name": "python3.4-minimal",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm11"
        },
        {
            "binary_name": "python3.4-venv",
            "binary_version": "3.4.3-1ubuntu1~14.04.7+esm11"
        }
    ]
}

Ubuntu:Pro:14.04:LTS / python3.5

Package

Name
python3.5
Purl
pkg:deb/ubuntu/python3.5@3.5.2-2ubuntu0~16.04.4~14.04.1+esm1?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.5.2-2ubuntu0~16.04.4~14.04.1+esm1

Affected versions

3.*

3.5.2-2ubuntu0~16.04.4~14.04.1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "idle-python3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
        },
        {
            "binary_name": "libpython3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
        },
        {
            "binary_name": "libpython3.5-dev",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
        },
        {
            "binary_name": "libpython3.5-minimal",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
        },
        {
            "binary_name": "libpython3.5-stdlib",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
        },
        {
            "binary_name": "libpython3.5-testsuite",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
        },
        {
            "binary_name": "python3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
        },
        {
            "binary_name": "python3.5-dev",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
        },
        {
            "binary_name": "python3.5-examples",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
        },
        {
            "binary_name": "python3.5-minimal",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
        },
        {
            "binary_name": "python3.5-venv",
            "binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / python3.5

Package

Name
python3.5
Purl
pkg:deb/ubuntu/python3.5@3.5.2-2ubuntu0~16.04.13+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.5.2-2ubuntu0~16.04.13+esm1

Affected versions

3.*

3.5.0-3
3.5.0-3ubuntu1
3.5.1~rc1-2ubuntu1
3.5.1-1
3.5.1-2
3.5.1-3
3.5.1-5
3.5.1-6ubuntu1
3.5.1-6ubuntu2
3.5.1-9ubuntu1
3.5.1-10
3.5.2-2~16.01
3.5.2-2~16.04
3.5.2-2ubuntu0~16.04.1
3.5.2-2ubuntu0~16.04.2
3.5.2-2ubuntu0~16.04.3
3.5.2-2ubuntu0~16.04.4
3.5.2-2ubuntu0~16.04.5
3.5.2-2ubuntu0~16.04.8
3.5.2-2ubuntu0~16.04.9
3.5.2-2ubuntu0~16.04.10
3.5.2-2ubuntu0~16.04.11
3.5.2-2ubuntu0~16.04.12
3.5.2-2ubuntu0~16.04.13

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "idle-python3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.13+esm1"
        },
        {
            "binary_name": "libpython3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.13+esm1"
        },
        {
            "binary_name": "libpython3.5-dev",
            "binary_version": "3.5.2-2ubuntu0~16.04.13+esm1"
        },
        {
            "binary_name": "libpython3.5-minimal",
            "binary_version": "3.5.2-2ubuntu0~16.04.13+esm1"
        },
        {
            "binary_name": "libpython3.5-stdlib",
            "binary_version": "3.5.2-2ubuntu0~16.04.13+esm1"
        },
        {
            "binary_name": "libpython3.5-testsuite",
            "binary_version": "3.5.2-2ubuntu0~16.04.13+esm1"
        },
        {
            "binary_name": "python3.5",
            "binary_version": "3.5.2-2ubuntu0~16.04.13+esm1"
        },
        {
            "binary_name": "python3.5-dev",
            "binary_version": "3.5.2-2ubuntu0~16.04.13+esm1"
        },
        {
            "binary_name": "python3.5-examples",
            "binary_version": "3.5.2-2ubuntu0~16.04.13+esm1"
        },
        {
            "binary_name": "python3.5-minimal",
            "binary_version": "3.5.2-2ubuntu0~16.04.13+esm1"
        },
        {
            "binary_name": "python3.5-venv",
            "binary_version": "3.5.2-2ubuntu0~16.04.13+esm1"
        }
    ]
}

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 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "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",
            "binary_version": "3.6.9-1~18.04ubuntu1.6"
        }
    ]
}

Ubuntu:18.04:LTS / python3.7

Package

Name
python3.7
Purl
pkg:deb/ubuntu/python3.7@3.7.5-2ubuntu1~18.04.2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.7.5-2ubuntu1~18.04.2

Affected versions

3.*

3.7.0~a2-1
3.7.0~a3-1
3.7.0~a3-2
3.7.0~a3-3
3.7.0~a4-1
3.7.0~b1-1
3.7.0~b1-1build1
3.7.0~b2-1
3.7.0~b3-1
3.7.0-1~18.04
3.7.1-1~18.04
3.7.3-2~18.04.1
3.7.5-2~18.04
3.7.5-2~18.04.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "idle-python3.7",
            "binary_version": "3.7.5-2ubuntu1~18.04.2"
        },
        {
            "binary_name": "libpython3.7",
            "binary_version": "3.7.5-2ubuntu1~18.04.2"
        },
        {
            "binary_name": "libpython3.7-dev",
            "binary_version": "3.7.5-2ubuntu1~18.04.2"
        },
        {
            "binary_name": "libpython3.7-minimal",
            "binary_version": "3.7.5-2ubuntu1~18.04.2"
        },
        {
            "binary_name": "libpython3.7-stdlib",
            "binary_version": "3.7.5-2ubuntu1~18.04.2"
        },
        {
            "binary_name": "libpython3.7-testsuite",
            "binary_version": "3.7.5-2ubuntu1~18.04.2"
        },
        {
            "binary_name": "python3.7",
            "binary_version": "3.7.5-2ubuntu1~18.04.2"
        },
        {
            "binary_name": "python3.7-dev",
            "binary_version": "3.7.5-2ubuntu1~18.04.2"
        },
        {
            "binary_name": "python3.7-examples",
            "binary_version": "3.7.5-2ubuntu1~18.04.2"
        },
        {
            "binary_name": "python3.7-minimal",
            "binary_version": "3.7.5-2ubuntu1~18.04.2"
        },
        {
            "binary_name": "python3.7-venv",
            "binary_version": "3.7.5-2ubuntu1~18.04.2"
        }
    ]
}

Ubuntu:18.04:LTS / python3.8

Package

Name
python3.8
Purl
pkg:deb/ubuntu/python3.8@3.8.0-3ubuntu1~18.04.2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.8.0-3ubuntu1~18.04.2

Affected versions

3.*

3.8.0-3~18.04
3.8.0-3~18.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "idle-python3.8",
            "binary_version": "3.8.0-3ubuntu1~18.04.2"
        },
        {
            "binary_name": "libpython3.8",
            "binary_version": "3.8.0-3ubuntu1~18.04.2"
        },
        {
            "binary_name": "libpython3.8-dev",
            "binary_version": "3.8.0-3ubuntu1~18.04.2"
        },
        {
            "binary_name": "libpython3.8-minimal",
            "binary_version": "3.8.0-3ubuntu1~18.04.2"
        },
        {
            "binary_name": "libpython3.8-stdlib",
            "binary_version": "3.8.0-3ubuntu1~18.04.2"
        },
        {
            "binary_name": "libpython3.8-testsuite",
            "binary_version": "3.8.0-3ubuntu1~18.04.2"
        },
        {
            "binary_name": "python3.8",
            "binary_version": "3.8.0-3ubuntu1~18.04.2"
        },
        {
            "binary_name": "python3.8-dev",
            "binary_version": "3.8.0-3ubuntu1~18.04.2"
        },
        {
            "binary_name": "python3.8-examples",
            "binary_version": "3.8.0-3ubuntu1~18.04.2"
        },
        {
            "binary_name": "python3.8-minimal",
            "binary_version": "3.8.0-3ubuntu1~18.04.2"
        },
        {
            "binary_name": "python3.8-venv",
            "binary_version": "3.8.0-3ubuntu1~18.04.2"
        }
    ]
}

Ubuntu:20.04:LTS / python3.8

Package

Name
python3.8
Purl
pkg:deb/ubuntu/python3.8@3.8.10-0ubuntu1~20.04.2?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.8.10-0ubuntu1~20.04.2

Affected versions

3.*

3.8.0-1
3.8.0-2
3.8.0-3
3.8.0-4
3.8.0-5
3.8.1-2ubuntu3
3.8.2~rc1-1ubuntu1
3.8.2-1
3.8.2-1ubuntu1
3.8.2-1ubuntu1.1
3.8.2-1ubuntu1.2
3.8.5-1~20.04
3.8.5-1~20.04.2
3.8.5-1~20.04.3
3.8.10-0ubuntu1~20.04
3.8.10-0ubuntu1~20.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "idle-python3.8",
            "binary_version": "3.8.10-0ubuntu1~20.04.2"
        },
        {
            "binary_name": "libpython3.8",
            "binary_version": "3.8.10-0ubuntu1~20.04.2"
        },
        {
            "binary_name": "libpython3.8-dev",
            "binary_version": "3.8.10-0ubuntu1~20.04.2"
        },
        {
            "binary_name": "libpython3.8-minimal",
            "binary_version": "3.8.10-0ubuntu1~20.04.2"
        },
        {
            "binary_name": "libpython3.8-stdlib",
            "binary_version": "3.8.10-0ubuntu1~20.04.2"
        },
        {
            "binary_name": "libpython3.8-testsuite",
            "binary_version": "3.8.10-0ubuntu1~20.04.2"
        },
        {
            "binary_name": "python3.8",
            "binary_version": "3.8.10-0ubuntu1~20.04.2"
        },
        {
            "binary_name": "python3.8-dev",
            "binary_version": "3.8.10-0ubuntu1~20.04.2"
        },
        {
            "binary_name": "python3.8-examples",
            "binary_version": "3.8.10-0ubuntu1~20.04.2"
        },
        {
            "binary_name": "python3.8-full",
            "binary_version": "3.8.10-0ubuntu1~20.04.2"
        },
        {
            "binary_name": "python3.8-minimal",
            "binary_version": "3.8.10-0ubuntu1~20.04.2"
        },
        {
            "binary_name": "python3.8-venv",
            "binary_version": "3.8.10-0ubuntu1~20.04.2"
        }
    ]
}

Ubuntu:20.04:LTS / python3.9

Package

Name
python3.9
Purl
pkg:deb/ubuntu/python3.9@3.9.5-3ubuntu0~20.04.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.9.5-3ubuntu0~20.04.1

Affected versions

3.*

3.9.0~rc1-1~20.04
3.9.0-5~20.04
3.9.5-3~20.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "idle-python3.9",
            "binary_version": "3.9.5-3ubuntu0~20.04.1"
        },
        {
            "binary_name": "libpython3.9",
            "binary_version": "3.9.5-3ubuntu0~20.04.1"
        },
        {
            "binary_name": "libpython3.9-dev",
            "binary_version": "3.9.5-3ubuntu0~20.04.1"
        },
        {
            "binary_name": "libpython3.9-minimal",
            "binary_version": "3.9.5-3ubuntu0~20.04.1"
        },
        {
            "binary_name": "libpython3.9-stdlib",
            "binary_version": "3.9.5-3ubuntu0~20.04.1"
        },
        {
            "binary_name": "libpython3.9-testsuite",
            "binary_version": "3.9.5-3ubuntu0~20.04.1"
        },
        {
            "binary_name": "python3.9",
            "binary_version": "3.9.5-3ubuntu0~20.04.1"
        },
        {
            "binary_name": "python3.9-dev",
            "binary_version": "3.9.5-3ubuntu0~20.04.1"
        },
        {
            "binary_name": "python3.9-examples",
            "binary_version": "3.9.5-3ubuntu0~20.04.1"
        },
        {
            "binary_name": "python3.9-full",
            "binary_version": "3.9.5-3ubuntu0~20.04.1"
        },
        {
            "binary_name": "python3.9-minimal",
            "binary_version": "3.9.5-3ubuntu0~20.04.1"
        },
        {
            "binary_name": "python3.9-venv",
            "binary_version": "3.9.5-3ubuntu0~20.04.1"
        }
    ]
}