Vigil@nce - Sinatra: Cross Site Scripting via Bad Request
August 2018 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can trigger a Cross Site Scripting via Bad Request of
Sinatra, in order to run JavaScript code in the context of the web
site.
Impacted products: Fedora.
Severity: 2/4.
Creation date: 25/06/2018.
DESCRIPTION OF THE VULNERABILITY
The Sinatra product offers a web service.
However, it does not filter received data via Bad Request before
inserting them in generated HTML documents.
An attacker can therefore trigger a Cross Site Scripting via Bad
Request of Sinatra, in order to run JavaScript code in the context
of the web site.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/Sinatra-Cross-Site-Scripting-via-Bad-Request-26509