UBUNTU-CVE-2021-40839

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Source
https://ubuntu.com/security/CVE-2021-40839
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-40839.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-40839
Upstream
Published
2021-09-10T02:15:00Z
Modified
2025-10-24T04:50:34Z
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

The rencode package through 1.0.6 for Python allows an infinite loop in typecode decoding (such as via ;\x2f\x7f), enabling a remote attack that consumes CPU and memory.

References

Affected packages

Ubuntu:16.04:LTS / python-rencode

Package

Name
python-rencode
Purl
pkg:deb/ubuntu/python-rencode@1.0.3-1build2?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.3-1build1
1.0.3-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python-rencode",
            "binary_version": "1.0.3-1build2"
        },
        {
            "binary_name": "python3-rencode",
            "binary_version": "1.0.3-1build2"
        }
    ]
}

Ubuntu:18.04:LTS / python-rencode

Package

Name
python-rencode
Purl
pkg:deb/ubuntu/python-rencode@1.0.5-1build2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.5-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python-rencode",
            "binary_version": "1.0.5-1build2"
        },
        {
            "binary_name": "python3-rencode",
            "binary_version": "1.0.5-1build2"
        }
    ]
}

Ubuntu:20.04:LTS / python-rencode

Package

Name
python-rencode
Purl
pkg:deb/ubuntu/python-rencode@1.0.6-1build1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.5-1build4
1.0.5-1build5
1.0.5-1.1
1.0.6-1
1.0.6-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-rencode",
            "binary_version": "1.0.6-1build1"
        }
    ]
}

Ubuntu:22.04:LTS / python-rencode

Package

Name
python-rencode
Purl
pkg:deb/ubuntu/python-rencode@1.0.6-2build1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.6-1build3
1.0.6-2
1.0.6-2build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-rencode",
            "binary_version": "1.0.6-2build1"
        }
    ]
}