Log Injection Affecting flask-cors package, versions [0,]


0.0
low

Snyk CVSS

    Attack Complexity High

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 0.04% (9th percentile)

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  • Snyk ID SNYK-PYTHON-FLASKCORS-6670412
  • published 22 Apr 2024
  • disclosed 19 Apr 2024
  • credit Elias Hohl

How to fix?

There is no fixed version for Flask-Cors.

Overview

Flask-Cors is an A Flask extension adding a decorator for CORS support

Affected versions of this package are vulnerable to Log Injection when the log level is set to debug. A user can inject or modify messages by abusing CRLF sequences in the request path of a GET request.

PoC

http://127.0.0.1:5000/api/test%0D%0A%0D%0ALOGINJECTION%0D%0A%0D%0A

References