Check Point Advisories

Digium Asterisk HTTP Connections Denial of Service (CVE-2014-4047)

Check Point Reference: CPAI-2014-1891
Date Published: 29 Oct 2014
Severity: Medium
Last Updated: 29 Oct 2014
Source: Digium AST-2014-007
Industry Reference:CVE-2014-4047
Protection Provided by:

Security Gateway
R77

  • R76
  • R75

  • Who is Vulnerable?
    Asterisk Asterisk Open Source prior to 1.8.28.1
    Asterisk Asterisk Open Source prior to 11.10.1
    Asterisk Asterisk Open Source prior to 12.3.1
    Asterisk Certified Asterisk prior to 1.8.15-cert6
    Asterisk Certified Asterisk prior to 11.6-cert3

    Vulnerability Description A denial of service vulnerability exists in Digium Asterisk. The vulnerability is due to the way HTTP sessions are being handled. A remote, unauthenticated attacker can exploit this vulnerability by establishing an excessive number of TCP connections to the configured HTTP or HTTPS port.

    Protection Overview

    Security Gateway R77 / R76 / R75 / R71 / R70

    1. In the IPS tab, click Protections and find the Digium Asterisk HTTP Connections Denial of Service 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:  VoIP Enforcement Violation.
    Attack Information:  Digium Asterisk HTTP Connections Denial of Service

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