Regular Expression Denial of Service (ReDoS) Affecting bleach package, versions *


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team

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  • Snyk ID npm:bleach:20151024
  • published 6 Nov 2015
  • disclosed 24 Oct 2015
  • credit Adam Baldwin

Overview

bleach 3.0 and earlier is vulnerable to Regular expression Denial of Service (ReDoS) when certain types of input are passed into the sanitize function.

bleach performs html sanitization, which has definite value from a security perspective. However, it does not control the length of the html it processes, and uses regular expressions to parse it. As a result, it is susceptible to a Regular expression Denial of Service (ReDoS) vulnerabilities, rendering an application unavailable if a long or complex input is passed in.

CVSS Scores

version 3.1
Expand this section

Snyk

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