Timing Attack Affecting com.vaadin:flow-server package, versions [,1.0.14) [1.1.0,2.4.7) [3.0.0,5.0.3)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    EPSS
    0.04% (14th percentile)

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  • Snyk ID SNYK-JAVA-COMVAADIN-1074927
  • published 15 Feb 2021
  • disclosed 26 Jan 2021
  • credit Xhelal Likaj

How to fix?

Upgrade com.vaadin:flow-server to version 1.0.14, 2.4.7, 5.0.3 or higher.

Overview

Affected versions of this package are vulnerable to Timing Attack due to using inconstant time comparison for CSRF tokens in the UIDL request handler, allowing attackers to guess a security token.

CVSS Scores

version 3.1
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Snyk

Recommended
5.9 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)
    High
  • Availability (A)
    None
Expand this section

NVD

2.5 low