Check Point Advisories

PowerDNS Nameserver Label Decompression Denial of Service (CVE-2015-1868)

Check Point Reference: CPAI-2015-0634
Date Published: 4 Jun 2015
Severity: High
Last Updated: Sunday 07 June, 2015
Source: PowerDNS.COM BV
Industry Reference:CVE-2015-1868
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? PowerDNS PowerDNS Recursor prior to 3.6.2
PowerDNS PowerDNS Recursor prior to 3.7.1
PowerDNS PowerDNS Authoritative Server prior to 3.3.1
PowerDNS PowerDNS Authoritative Server prior to 3.4.3
Vulnerability Description A denial of service vulnerability exists in PowerDNS. The vulnerability is due to a design weakness in PowerDNS label decompression code causing excessive looping. A remote attacker can exploit these vulnerabilities by sending a request to a vulnerable server to consume CPU resource.

Protection Overview

This protection will detect and block 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

  1. In the IPS tab, click Protections and find the PowerDNS Nameserver Label Decompression Denial of Service protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  DNS Enforcement Violation.
Attack Information:  PowerDNS Nameserver Label Decompression Denial of Service

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