HTTP Request Smuggling Affecting mitmproxy package, versions [,7.0.3)


Severity

0.0
high
0
10

    Threat Intelligence

    EPSS
    0.19% (57th percentile)

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  • Snyk ID SNYK-PYTHON-MITMPROXY-1585665
  • published 16 Sep 2021
  • disclosed 16 Sep 2021
  • credit João Sobral (@chinchila)

How to fix?

Upgrade mitmproxy to version 7.0.3 or higher.

Overview

mitmproxy is an interactive, SSL/TLS-capable intercepting proxy with a console interface for HTTP/1, HTTP/2, and WebSockets.

Affected versions of this package are vulnerable to HTTP Request Smuggling. A malicious client or server is able to perform 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.

References

CVSS Scores

version 3.1
Expand this section

Snyk

7.3 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    Low
Expand this section

NVD

9.8 critical