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


Check Point Reference: CPAI-2013-3618
Date Published:
Source: Nginx Advisory SA55757
Industry Reference(s): 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 Details
The 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.

To configure the defense, select your product from the list below and follow the related protection steps.

Security Gateway R75 / R71 / R70

How Can I Protect My Network?

  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.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:
Attack Name: Web Server Enforcement Violation
Attack Information: Non-HTTP Traffic over HTTP Port