News

Diligence Points out Firewall Vulnerability

Diligence (London, www.diligence.co.uk), a security consulting firm discovered a vulnerability in a stateful packet filter-based firewall.

This latest discovery found that a stateful packet inspection firewall allows several types of IP traffic, including DNS, ICMP and RIP to flow unchecked through the firewall to attack systems. Diligence demonstrated that these holes can be exploited with the controversial BackOrifice Trojan horse program. The problem can be patched by changing the default settings.

"Secure firewall design principles require that everything not expressly permitted is prohibited," says Frank Willoughby, president, Fortified Networks Inc. "Therefore, a firewall’s default security rules at installation time should block all network traffic from passing through the firewall, especially DNS, IMCP and RIP."

These vulnerabilities are not typical of all firewalls. Application-level proxy firewalls, for instance, create a secure, fail-safe environment.

However, in making this announcement, Diligence joins the ranks of independent security watch groups that in the past few months have identified at least five critical vulnerabilities associated with firewalls based on stateful packet inspection architecture. Other documented vulnerabilities include unencrypted remote management, stealth scanning and reserved word problems. – Thomas Sullivan, Staff Reporter/Reviews Editor

About the Author

Scott Bekker is editor in chief of Redmond Channel Partner magazine.

Featured

  • Microsoft Previews Windows Autopilot for HoloLens 2

    Microsoft on Friday announced a public preview of Windows Autopilot for HoloLens 2, its mixed-reality headset.

  • Microsoft Flirts with Charging for API Software Connections

    Microsoft may have started something new by attempting to charge its customers for software that uses its application programming interfaces (APIs).

  • Overcoming Spacesuit Anxiety During Astronaut Training

    Spacesuits are heavy, claustrophobic and hot -- an uncomfortable combination for many would-be astronauts. Here's how Brien came around to the idea of wearing one.

  • Microsoft Announces Azure Kubernetes Service Enhancements

    Microsoft this week announced a few Azure Kubernetes Service (AKS) product milestones as part of the KubeCon event.

comments powered by Disqus