CVE-2021-39214 : Exploit Details and Defense Strategies
Find out about CVE-2021-39214, a vulnerability in mitmproxy allowing HTTP request smuggling attacks. Learn the impact, technical details, and mitigation strategies here.
CVE-2021-39214, titled 'Lacking Protection against HTTP Request Smuggling in mitmproxy,' involves a vulnerability in mitmproxy versions below 7.0.3 allowing malicious clients or servers to perform HTTP request smuggling attacks. This article provides insights into the CVE details, its impact, technical descriptions, and mitigation strategies.
Understanding CVE-2021-39214
This section delves into the specifics of the CVE-2021-39214 vulnerability affecting mitmproxy.
What is CVE-2021-39214?
Mitmproxy, an SSL/TLS-capable intercepting proxy, experienced a flaw in versions 7.0.2 and below that enabled malicious entities to execute HTTP request smuggling attacks through the proxy. The vulnerability was rectified in versions 7.0.3 and higher.
The Impact of CVE-2021-39214
The impact of CVE-2021-39214 can be significant due to its high severity ratings across various CVSS metrics.
Technical Details of CVE-2021-39214
In this section, the technical aspects of the CVE-2021-39214 vulnerability are explored.
Vulnerability Description
The vulnerability in mitmproxy versions below 7.0.3 allowed for HTTP request smuggling attacks by malicious clients or servers, posing a risk of unauthorized request/response manipulation.
Affected Systems and Versions
- Affected Product: mitmproxy
- Vendor: mitmproxy
- Vulnerable Versions: Below 7.0.3
Exploitation Mechanism
- Attack Complexity: High
- Attack Vector: Network
- Privileges Required: None
- User Interaction: None
- Impact: High severity affecting confidentiality, integrity, and availability
Mitigation and Prevention
Mitigation strategies and proactive measures to address the CVE-2021-39214 vulnerability are crucial for maintaining system security.
Immediate Steps to Take
- Update mitmproxy to version 7.0.3 or above to mitigate the vulnerability.
Long-Term Security Practices
- Regularly monitor security advisories and promptly apply software updates.
- Implement network security measures to prevent malicious HTTP request smuggling.
Patching and Updates
Ensure timely application of patches and updates to mitigate known vulnerabilities and enhance system security.