UBUNTU-CVE-2020-14343

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Source

https://ubuntu.com/security/CVE-2020-14343

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-14343.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-14343

Related

Published

2021-02-09T21:15:00Z

Modified

2021-02-09T21:15:00Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

[none]

Details

A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747.

References

Affected packages

Ubuntu:20.04:LTS / pyyaml

Package

Name: pyyaml
Purl: pkg:deb/ubuntu/pyyaml?arch=src?distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.3.1-1ubuntu0.1

Affected versions

5.*

5.1.2-1

5.1.2-1build1

5.3-1ubuntu1

5.3-1ubuntu2

5.3-1ubuntu3

5.3-2

5.3.1-1

Ecosystem specific

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "5.3.1-1ubuntu0.1",
            "binary_name": "python-yaml"
        },
        {
            "binary_version": "5.3.1-1ubuntu0.1",
            "binary_name": "python-yaml-dbg"
        },
        {
            "binary_version": "5.3.1-1ubuntu0.1",
            "binary_name": "python3-yaml"
        },
        {
            "binary_version": "5.3.1-1ubuntu0.1",
            "binary_name": "python3-yaml-dbg"
        }
    ]
}