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Insecure Randomness Affecting com.github.penggle:kaptcha package, versions [0,]

0.0
medium

Snyk CVSS

    Attack Complexity High
Expand this section
NVD
9.8 critical

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  • Snyk ID SNYK-JAVA-COMGITHUBPENGGLE-72734
  • published 25 Dec 2018
  • disclosed 19 Oct 2018
  • credit FanjunMeng
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Introduced: 19 Oct 2018

CVE-2018-18531 Open this link in a new tab
CWE-310 Open this link in a new tab

How to fix?

There is no fixed version for com.github.penggle:kaptcha.

Overview

com.github.penggle:kaptcha is a default output produces a google captcha.

Affected versions of this package are vulnerable to Insecure Randomness. text/impl/DefaultTextCreator.java, text/impl/ChineseTextProducer.java, and text/impl/FiveLetterFirstNameTextCreator.java in kaptcha use the Random (rather than SecureRandom) function for generating CAPTCHA values, which makes it easier for remote attackers to bypass intended access restrictions via a brute-force approach.