CVE-2020-1747 : Vulnerability Insights and Analysis
Learn about CVE-2020-1747, a critical vulnerability in PyYAML library before version 5.3.1 allowing arbitrary code execution. Find mitigation steps and necessary updates here.
A vulnerability in the PyYAML library allows arbitrary code execution, affecting Red Hat's PyYAML version 5.3.1.
Understanding CVE-2020-1747
PyYAML library versions before 5.3.1 are at risk of arbitrary code execution through untrusted YAML file processing.
What is CVE-2020-1747?
The vulnerability in PyYAML (before version 5.3.1) enables attackers to execute arbitrary code by leveraging the full_load method or FullLoader loader with untrusted YAML files.
The Impact of CVE-2020-1747
The vulnerability has a CVSS base score of 9.8, categorizing it as critical. It poses a high risk to confidentiality, integrity, and availability, requiring no special privileges to exploit.
Technical Details of CVE-2020-1747
The technical aspects of the vulnerability are as follows:
Vulnerability Description
- PyYAML library before 5.3.1 can lead to arbitrary code execution when processing untrusted YAML files.
Affected Systems and Versions
- Product: PyYAML
- Vendor: Red Hat
- Vulnerable Version: 5.3.1
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
Mitigation and Prevention
Taking necessary steps to mitigate and prevent the exploit is crucial.
Immediate Steps to Take
- Update PyYAML to version 5.3.1 or later.
- Avoid processing untrusted YAML files with vulnerable versions.
Long-Term Security Practices
- Implement input validation for all untrusted data.
- Monitor and restrict external input that can reach the PyYAML library.
- Conduct regular security assessments and updates.
Patching and Updates
- Apply security patches promptly to mitigate the vulnerability and enhance system security.