Timing Attack Affecting symfony/symfony package, versions >=2.8.0, <2.8.52 >=3.4.0, <3.4.35 >=4.2.0, <4.2.12 >=4.3.0, <4.3.8


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    EPSS
    0.87% (83rd percentile)

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  • Snyk ID SNYK-PHP-SYMFONYSYMFONY-535350
  • published 22 Nov 2019
  • disclosed 21 Nov 2019
  • credit Unknown

How to fix?

Upgrade symfony/symfony to version 2.8.52, 3.4.35, 4.2.12, 4.3.8 or higher.

Overview

symfony/symfony is a PHP framework for web applications and a set of reusable PHP components.

Affected versions of this package are vulnerable to Timing Attack. When checking the signature of an URI (an ESI fragment URL for instance), the URISigner does not use a constant time string comparison function, resulting in a potential remote timing attack vulnerability.

CVSS Scores

version 3.1
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Snyk

Recommended
4.2 medium
  • Attack Vector (AV)
    Adjacent
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    None
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NVD

8.1 high