QID 980381

QID 980381: Python (pip) Security Update for mitmproxy (GHSA-22gh-3r9q-xf38)

Security update has been released for mitmproxy to fix the vulnerability.

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

In mitmproxy 7.0.2 and below, a malicious client or server is able to perform [HTTP request smuggling](https://en.wikipedia.org/wiki/HTTP_request_smuggling) attacks through mitmproxy. This means that a malicious client/server could smuggle a request/response through mitmproxy as part of another request/response's HTTP message body. While mitmproxy would only see one request, the target server would see multiple requests. A smuggled request is still captured as part of another request's body, but it does not appear in the request list and does not go through the usual mitmproxy event hooks, where users may have implemented custom access control checks or input sanitization.

Unless you use mitmproxy to protect an HTTP/1 service, no action is required.

  • CVSS V3 rated as Critical - 9.8 severity.
  • CVSS V2 rated as High - 7.5 severity.
    • Solution
    The vulnerability has been fixed in mitmproxy 7.0.3 and above.
    Vendor References

    CVEs related to QID 980381

    CVE-2021-39214 |
    Software Advisories
    Advisory ID Software Component Link
    GHSA-22gh-3r9q-xf38 mitmproxy URL Logo github.com/advisories/GHSA-22gh-3r9q-xf38
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