Check Point Advisories

Jenkins Jetty Buffer Overflow (CVE-2019-17638)

Vulnerability
Protection

Check Point Reference:	CPAI-2019-2209
Date Published:	25 Aug 2020
Severity:	Critical
Last Updated:	Tuesday 25 August, 2020
Source:
Industry Reference:	CVE-2019-17638
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Jenkins weekly prior to and 2.242 Jenkins LTS prior to and 2.235.4
Vulnerability Description	A buffer overflow vulnerability exists in Jenkins Jetty. Successful exploitation of this vulnerability could allow unauthenticated attackers to obtain HTTP response headers that may include sensitive data intended for another user.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the Jenkins Jetty Buffer Overflow (CVE-2019-17638) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: Jenkins Jetty Buffer Overflow (CVE-2019-17638)