CVE-2019-16792 : Vulnerability Insights and Analysis
Learn about CVE-2019-16792, a vulnerability in Waitress version 1.3.1 allowing request smuggling through the duplication of the Content-Length header. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
Waitress version 1.3.1 is vulnerable to request smuggling due to a double Content-Length header issue. Learn about the impact, technical details, and mitigation steps.
Understanding CVE-2019-16792
What is CVE-2019-16792?
Waitress version 1.3.1 allows request smuggling by sending the Content-Length header twice, leading to potential security risks.
The Impact of CVE-2019-16792
The vulnerability in Waitress version 1.3.1 could result in request smuggling through the duplication of the Content-Length header, potentially allowing malicious actors to manipulate requests.
Technical Details of CVE-2019-16792
Vulnerability Description
- Waitress fails to handle double Content-Length headers correctly, setting the Content-Length to 0 internally.
- Sending two Content-Length headers in a single request may cause Waitress to misinterpret the request, treating the body as a new request in HTTP pipelining.
Affected Systems and Versions
- Product: Waitress
- Vendor: Pylons
- Versions Affected: <= 1.3.1
Exploitation Mechanism
- Attack Complexity: HIGH
- Attack Vector: NETWORK
- Confidentiality Impact: HIGH
- Integrity Impact: LOW
- Privileges Required: LOW
- Scope: CHANGED
- User Interaction: NONE
Mitigation and Prevention
Immediate Steps to Take
- Upgrade to Waitress version 1.4.0 or later to mitigate the vulnerability.
- Monitor vendor security advisories for any patches or updates.
Long-Term Security Practices
- Regularly update software and dependencies to prevent known vulnerabilities.
- Implement secure coding practices to avoid similar issues in the future.
Patching and Updates
- Apply security patches promptly to address any identified vulnerabilities.