DNS Rebinding Vulnerability in mitmproxy: CVE-2018-14505
Summary
CVE-2018-14505: mitmweb in mitmproxy v4.0.3 allows DNS Rebinding attacks, related to tools/web/app.py. Affects mitmproxy across 2 version ranges.
< 3.0.4-1
< b62b119779dac8fa6b992fa225c46b7b7e9e0f88
Fixed in 3.0.4-1. How to fix ↓
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Background
mitmproxy is an open-source proxy tool that allows developers to intercept, inspect, modify, and replay web traffic. It is widely used for debugging and testing web applications. The tool provides a user-friendly interface and supports various protocols, making it a popular choice among developers. However, in version 4.0.3, mitmproxy is vulnerable to DNS Rebinding attacks, which can compromise the security of applications relying on it.
Vulnerability Detail
CVE-2018-14505 is a vulnerability in mitmproxy that allows attackers to exploit DNS Rebinding techniques. This vulnerability arises from improper handling of DNS responses, enabling an attacker to redirect traffic to malicious servers. The ramifications include unauthorized access to sensitive data, potential data manipulation, and the ability to perform actions on behalf of the user without their consent. The vulnerability affects versions prior to 3.0.4-1, and it is crucial for users to understand the risks associated with using affected versions.
How To Fix
Minimum fixed version
3.0.4-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade mitmproxyTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading is not immediately possible, consider implementing network-level protections such as firewalls that can block malicious DNS requests. Additionally, avoid using mitmproxy in environments where sensitive data is transmitted until the vulnerability is resolved.
Conclusion
CVE-2018-14505 represents a significant security risk for users of mitmproxy version 4.0.3 and earlier. It is essential to upgrade to the latest version to protect against DNS Rebinding attacks. Users should also consider using tools like Vulert to monitor for vulnerabilities in their applications.
See every vulnerability recorded for mitmproxy →
FAQ
DNS Rebinding is a technique that allows an attacker to manipulate the DNS resolution process, redirecting a victim's browser to a malicious server while appearing to be a legitimate site.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Simply upload your manifest file like package-lock.json to check for vulnerabilities.
The potential impacts include unauthorized access to sensitive information, data manipulation, and the ability for attackers to perform actions on behalf of the user.
Yes, implementing network-level protections and avoiding the use of mitmproxy in sensitive environments can help mitigate the risk until an upgrade is possible.
The CVSS score for CVE-2018-14505 is 8.8, indicating a high severity level.
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