Check Point Advisories

XStream Library Arbitrary File Deletion (CVE-2020-26259)

Vulnerability
Protection

Check Point Reference:	CPAI-2020-3338
Date Published:	27 Apr 2021
Severity:	High
Last Updated:	Tuesday 27 April, 2021
Source:
Industry Reference:	CVE-2020-26259
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	XStream
Vulnerability Description	An arbitrary file deletion vulnerability exists in the XStream library. The vulnerability is due to improper validation of user input during unmarshalling of XML and JSON data.

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 R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the XStream Library Arbitrary File Deletion (CVE-2020-26259) 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: XStream Library Arbitrary File Deletion (CVE-2020-26259)