CVE-2020-27619 : Exploit Details and Defense Strategies
Learn about CVE-2020-27619, a Python vulnerability allowing HTTP content eval. Understand the impact, affected versions, exploitation, and mitigation steps.
In Python 3 through 3.9.0, the Lib/test/multibytecodec_support.py CJK codec tests call eval() on content retrieved via HTTP.
Understanding CVE-2020-27619
This CVE involves a vulnerability in Python versions 3 through 3.9.0 that allows the execution of eval() on content fetched via HTTP.
What is CVE-2020-27619?
The vulnerability in Python versions 3 through 3.9.0 enables the execution of eval() on data obtained through HTTP requests.
The Impact of CVE-2020-27619
The vulnerability could potentially lead to remote code execution and other security risks for systems using the affected Python versions.
Technical Details of CVE-2020-27619
This section provides more in-depth technical information about the CVE.
Vulnerability Description
The issue arises from the CJK codec tests in Python's Lib/test/multibytecodec_support.py file, which inappropriately utilize eval() on HTTP-retrieved content.
Affected Systems and Versions
- Python versions 3 through 3.9.0
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting malicious HTTP responses that trigger the execution of arbitrary code via eval().
Mitigation and Prevention
Protecting systems from CVE-2020-27619 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Update Python to a patched version that addresses the vulnerability.
- Avoid executing eval() on untrusted data.
- Implement network security measures to prevent malicious HTTP responses.
Long-Term Security Practices
- Regularly update Python and other software to the latest secure versions.
- Follow secure coding practices and avoid using potentially dangerous functions like eval().
Patching and Updates
- Apply patches provided by Python to fix the vulnerability and enhance system security.