CVE-2019-8341 Explained : Impact and Mitigation
Learn about CVE-2019-8341, a security flaw in Jinja2 version 2.10 allowing Server Side Template Injection (SSTI). Understand the impact, affected systems, exploitation, and mitigation steps.
A security flaw in Jinja2 version 2.10 allows for Server Side Template Injection (SSTI) through the 'from_string' feature, potentially enabling attackers to inject commands into a URI. The validity of this vulnerability is disputed due to recommendations against using untrusted templates without sandboxing.
Understanding CVE-2019-8341
This CVE entry highlights a potential security issue in Jinja2 version 2.10, related to Server Side Template Injection (SSTI) through the 'from_string' feature.
What is CVE-2019-8341?
Jinja2 version 2.10 is susceptible to SSTI via the 'from_string' feature, where the 'source' parameter acts as a template object that, when rendered and returned, can be exploited by injecting commands into a URI.
The Impact of CVE-2019-8341
The vulnerability could allow an attacker to execute arbitrary code on the server, potentially leading to data breaches, system compromise, and unauthorized access.
Technical Details of CVE-2019-8341
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The 'from_string' function in Jinja2 2.10 is prone to SSTI, enabling attackers to inject malicious commands into a URI, potentially leading to code execution on the server.
Affected Systems and Versions
- Product: N/A
- Vendor: N/A
- Version: 2.10
Exploitation Mechanism
Attackers can exploit the vulnerability by injecting {{INJECTION COMMANDS}} into a URI, taking advantage of the 'source' parameter acting as a template object.
Mitigation and Prevention
Protecting systems from potential exploits and ensuring security measures are crucial.
Immediate Steps to Take
- Update Jinja2 to a patched version or apply relevant security fixes provided by the vendor.
- Avoid using untrusted templates without proper sandboxing.
Long-Term Security Practices
- Implement secure coding practices to prevent injection attacks.
- Regularly monitor and audit applications for vulnerabilities.
Patching and Updates
- Stay informed about security advisories and updates from Jinja2.
- Apply patches promptly to address known vulnerabilities.