Check Point Advisories

Preemptive Protection against Nginx Request URI Verification Security Bypass (CVE-2013-4547)

Check Point Reference: CPAI-2013-3618
Date Published: 10 Dec 2013
Severity: High
Last Updated: Sunday 24 May, 2026
Source: CVE-2013-4547
Protection Provided by:

Security Gateway
R75
Who is Vulnerable? nginx HTTP Server 1.5.x prior to 1.5.7
nginx HTTP Server 1.x prior 1.4.4
Vulnerability Description A security bypass vulnerability has been reported in Nginx.
Vulnerability DetailsThe vulnerability is caused by improper handling of unescaped space characters within URIs.A remote attacker can exploit this vulnerability to bypass security restrictions in certain configurations.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability.No update is required to address this vulnerability.Users are protected against this vulnerability if the Non-HTTP Traffic over HTTP Port protection found in the Protection section of CPAI-2012-118 has been applied.

Security Gateway R75 / R71 / R70

  1. In the IPS tab, click Protections and find the Non-HTTP Traffic over HTTP Port protection using the Search tool and Edit the protection's settings.
  2. Install policy on all modules.

SmartView Tracker will log the following entries:
Attack Name: Web Server Enforcement Violation
Attack Information: Non-HTTP Traffic over HTTP Port

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