Check Point Advisories

OpenSSH sshd Username Information Disclosure (CVE-2018-15473)

Vulnerability
Protection

Check Point Reference:	CPAI-2019-0059
Date Published:	21 Jan 2019
Severity:	High
Last Updated:	Monday 21 January, 2019
Source:
Industry Reference:	CVE-2018-15473
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	OpenSSH.
Vulnerability Description	An information disclosure vulnerability exists in OpenSSH. The vulnerability is due to the different ways in which the sshd daemon responds to crafted SSH packets. A successful attack can result in the attacker being able to determine whether a user exists on the system.

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 OpenSSH sshd Username Information Disclosure 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: SSH Protection Violation.
Attack Information: OpenSSH sshd Username Information Disclosure