Man-in-the-Middle (MitM) Affecting symfony/symfony package, versions >=2, <2.3.27 >=2.4.0, <2.5.11 >=2.6.0, <2.6.6


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team

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  • Snyk ID SNYK-PHP-SYMFONYSYMFONY-70216
  • published 1 Apr 2015
  • disclosed 1 Apr 2015
  • credit Dmitrii Chekaliuk

How to fix?

Upgrade symfony/symfony to version 2.3.27, 2.5.11, 2.6.6 or higher.

Overview

Affected versions of symfony/symfony are vulnerable to Man-in-the-Middle (MitM).

The Symfony\Component\HttpFoundation\Request class provides a mechanism that ensures it does not trust HTTP header values coming from a "non-trusted" client. Unfortunately, it assumes that the remote address is always a trusted client if at least one trusted proxy is involved in the request; this allows a man-in-the-middle attack between the latest trusted proxy and the web server.

CVSS Scores

version 3.1
Expand this section

Snyk

Recommended
6.5 medium
  • 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)
    None