Check Point Advisories

Linux Kernel NFSv4 nfsd PNFS denial of Service (CVE-2017-8797)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0789
Date Published:	25 Sep 2017
Severity:	High
Last Updated:	Sunday 21 June, 2020
Source:	Linux Kernel Project
Industry Reference:	CVE-2017-8797
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Linux Kernel Project Kernel prior to 4.12
Vulnerability Description	A denial of service vulnerability exists in the NFSv4 component of the Linux Kernel. The vulnerability is due to improper handling of the pNFS LAYOUTGET and GETDEVICEINFO commands. A remote attacker can exploit this vulnerability by sending maliciously crafted packets to a vulnerable 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 Linux Kernel NFSv4 nfsd PNFS denial of Service 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: NFS Protection Violation.
Attack Information: Linux Kernel NFSv4 nfsd PNFS denial of Service