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Log Injection Affecting flask-cors package, versions [,4.0.1)

Severity

 Recommended
0.0
low
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    Exploit Maturity
    Proof of concept
    EPSS
    0.04% (11th percentile)

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  • Snyk ID SNYK-PYTHON-FLASKCORS-6670412
  • published 22 Apr 2024
  • disclosed 19 Apr 2024
  • credit Elias Hohl
Report a new vulnerability Found a mistake?

Introduced: 19 Apr 2024

CVE-2024-1681 Open this link in a new tab
CWE-117 Open this link in a new tab

How to fix?

Upgrade Flask-Cors to version 4.0.1 or higher.

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

CVSS Scores

version 3.1
Expand this section

Snyk

Recommended
3.1 low
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    Low
  • Availability (A)
    None