Check Point Advisories

Rsync receive_xattr Heap-based Buffer Overread (CVE-2017-16548)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-1008
Date Published:	20 Nov 2017
Severity:	Low
Last Updated:	Wednesday 23 January, 2019
Source:
Industry Reference:	CVE-2017-16548
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	rsync Project rsync 3.1.2 rsync Project rsync 3.1.3-development
Vulnerability Description	A heap-based buffer overread vulnerability exists in the receive_xattr function of rsync. The vulnerability is due to an error in processing non NULL terminated extended attribute name strings in certain cases when using the rsync protocol. A remote, unauthenticated attacker could exploit this vulnerability by sending crafted packets to a target 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 Rsync receive_xattr Heap-based Buffer Overread 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: Content Protection Violation.
Attack Information: Rsync receive_xattr Heap-based Buffer Overread