CVE-2020-14343

Aliases:GHSA-8q59-q68h-6hv4PYSEC-2021-142
Advisory lineage Upstream: 0 Downstream: 14
Modified
Published: 09 Feb 2021, 00:00
Last modified:04 Aug 2024, 12:39

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
10 HIGH
v2.0 (nvd)
EPSS Score
13.7% MEDIUM
14% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

09 Feb 2021, 00:00
Published
Vulnerability first disclosed
04 Aug 2024, 12:39
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v4.0•CRITICAL•Score: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  • v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • v2.0•HIGH•Score: 10AV:N/AC:L/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 13.70%• Percentile: 94%

Techniques & Countermeasures

  • CWE-20•Improper Input Validation

    The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected Systems

  • oracle•communications_cloud_native_core_network_function_cloud_native_environment

    1.10.0 | 22.1.0

  • PyPI•pyyaml

    < 5.4

  • pyyaml•pyyaml

    ≥ 5.1, < 5.4

References (12)