GHSA-8q89-pwhh-7wfq

Use of Insufficiently Random Values in penggle:kaptcha

Source: GitHub Advisory Database (reviewed) Critical CVE-2018-18531

Packages

Ecosystem	Package	Affected	Fixed in
Maven	com.github.penggle:kaptcha	<= 2.3.2	no fix listed

Details

As written in the advisory (Markdown source, shown as plain text).

text/impl/DefaultTextCreator.java, text/impl/ChineseTextProducer.java, and text/impl/FiveLetterFirstNameTextCreator.java in kaptcha 2.3.2 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.

References

External links from the advisory. They lead to third-party sites.

https://nvd.nist.gov/vuln/detail/CVE-2018-18531 advisory
https://github.com/penggle/kaptcha/issues/3 web
https://github.com/advisories/GHSA-8q89-pwhh-7wfq advisory
https://github.com/penggle/kaptcha package