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Paul Asadoorian

Profile picture for user Paul Asadoorian
As founder and CEO of Security Weekly, Paul remains one of the world’s foremost experts on all things cybersecurity. Security Weekly is a one-stop resource for podcasts, webcasts and other content, informing community members about penetration testing, vulnerability analysis, ethical hacking and embedded device testing. Previously, Paul served as a lead IT security specialist for Brown University, and as an instructor with The SANS Institute.
Blog Post

Tenable Network Security Podcast Episode 105

Hosts Paul Asadoorian, Product EvangelistCarlos Perez, Lead Vulnerability ResearcherJack Daniel, Product Manager Ron Gula, Tenable's CEO/CTO Announcements Check out our video channel on YouTube that contains the latest Nessus and SecurityCenter 4 tutorials.

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Mobile Devices, Your Network, and Passive Sniffing

Do you know how many mobile devices reside on your network? Is your security architecture designed to secure the mobile platform and protect your users and the network from the threats they pose? Mobile devices are a security concern for many reasons. Mobile devices are typically unmanaged – meaning they may or may not be running AV software, a firewall, or conform to enforceable security policies. Yet, whether they are provided to your employees as part of your operations or not, they are likely accessing resources on your network. To compound the problem, many mobile devices connect to your local network and the Internet directly on two separate mediums. For example, the device may associate to a wireless belonging to your organization and a 3G/4G connection to the Internet.

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Tenable Network Security Podcast Episode 104

Hosts Paul Asadoorian, Product EvangelistCarlos Perez, Lead Vulnerability ResearcherJack Daniel, Product Manager Ron Gula, Tenable's CEO/CTO and media expert! Announcements Check out our video channel on YouTube that contains the latest Nessus and SecurityCenter 4 tutorials. We're hiring! - Visit the Tenable web site for more information about open positions. You can subscribe to the Tenable Network Security Podcast on iTunes! Tenable Tweets - You can find us on Twitter at http://twitter.com/tenablesecurity where we make product and company announcements, provide Nessus plugin statistics and more! Stories

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Tenable Network Security Podcast Episode 103

Welcome to the Tenable Network Security Podcast Episode 103 Hosts Paul Asadoorian, Product EvangelistCarlos Perez, Lead Vulnerability ResearcherJack Daniel, Product Manager Announcements Check out our video channel on YouTube that contains the latest Nessus and SecurityCenter 4 tutorials. We're hiring! - Visit the Tenable web site for more information about open positions. You can subscribe to the Tenable Network Security Podcast on iTunes! Tenable Tweets - You can find us on Twitter at http://twitter.com/tenablesecurity where we make product and company announcements, provide Nessus plugin statistics and more!

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Discovering Dropbox On Your Network

Why is "Cloud Storage" So Appealing? Services such as DropBox use the cloud to enable users to share files with others and transfer work from office to home and back. The challenge is two-fold: Determine how this and other cloud-based technologies align with the organization’s security policies and compliance mandates. Monitor use of these solutions to ensure compliance and limit exposure while preserving benefit. Users often turn from sanctioned file sharing methods when they reach the limits of email and internal file sharing capacity, performance, and functionality. Email was not intended to share large files, and very often restrictions are implemented on the size of an individual email and how large your inbox can grow. Users can put files on an internal file sharing service, but that limits access to local users and VPN connected users. Employees who travel or third-parties may not have access to the internal network to retrieve the files. Many IT departments do not offer an easy way to share files through more traditional methods such as public FTP servers because of security concerns. Dropbox overcomes many of these issues and has become quite popular, as evidenced by a recent influx of $250 million additional dollars in funding. The price is right too, as you can get 2GB of storage for free and manage access to your files. The problem is, DropBox security and usage often violate corporate policy and security best practice. Corporate policy must protect sensitive information, such as customer data and intellectual property. If this information is being transmitted insecurely to a service such as Dropbox your policies and network defenses should detect this behavior and monitor for violations and information leakage. For example, Dropbox relies on SSL for encryption. Several attacks released this year have been reported that can circumvent SSL security, and SSL certificate authorities have been compromised, breaking down the trust that SSL relies upon for security and integrity. Client software can become the weakest link as well, even if SSL is implemented properly. The Dropbox client software has contained vulnerabilities that, when exploited, could lead to your data in the wrong hands. To solve this problem we need to implement encryption at the file level to protect sensitive data. I have to admit, I am a Dropbox user. However, I use it with caution and implement my own security policy. Any sensitive data is sent to DropBox using file encryption (PGP in this case). Any non-sensitive information is not encrypted and I am careful to distinguish between the two.

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Microsoft Patch Tuesday Roundup - November 2011

The most interesting, and concerning, vulnerability patched this month is the remote TCP/IP code execution flaw fixed with MS11-083. The flaw can be triggered by sending a large number of UDP packets to a non-listening port on a remote host.

Blog Post

Tenable Network Security Podcast Episode 102

Hosts Paul Asadoorian, Product EvangelistCarlos Perez, Lead Vulnerability ResearcherJack Daniel, Product Manager Announcements Check out our video channel on YouTube that contains the latest Nessus and SecurityCenter 4 tutorials.

Blog Post

Tenable Network Security Podcast Episode 101

Hosts Paul Asadoorian, Product EvangelistCarlos Perez, Lead Vulnerability ResearcherJack Daniel, Product Manager Announcements Check out our video channel on YouTube that contains the latest Nessus and SecurityCenter 4 tutorials.

Blog Post

Tenable Network Security Showcase - Chicago 2011

Join Tenable co-founders Ron Gula and Renaud Deraison, along with Tenable CSO Marcus Ranum and Product Evangelist Paul Asadoorian for a private network security event on November 16, from 8:00 am to 2:00 pm at the Whitehall Hotel in downtown Chicago. Topics we will discuss during this FREE event include:

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Dealing with "Untouchable" Systems

"The Untouchables" An untouchable system is one on which you cannot install software (such as agents) or apply security fixes regularly. I have come up with several different examples of such systems, and tried to use examples here from my own experiences to define why they may fall into the "untouchable" category: Select SCADA systems - This is a broad category, but it boils down to computers that are used in control systems networks. While many may be considered to be "air-gapped" (physically disconnected from any other types of systems), that may not actually be the case since connectivity is required to manage the devices (especially those deployed in the field). I was once approached to perform a vulnerability assessment against one such system. I was told that network access would be provided, but that the system in question was responsible for providing power to thousands of people. This is a scary endeavor, as not only could you put thousands of people in the dark, but potentially damage infrstructure if the power is turned on and off too quickly. This situation requires a different approach than a traditional network vulnerability assessment or penetration testing. Traveling Laptops - It can be difficult to control the software and patches on systems that rarely connect to the corporate network. The concern is what happens when a laptop that has been connected to airport, hotel and other potentially hostile networks comes back to home base and plugs into your network. It may already be infected, and may not be up-to-date with patches. You can try to force users to connect back to your network via a VPN, but not all users may do this on a regular basis. During the user’s travel, the system is "untouchable". Network Devices – Let’s face it, no matter how redundant your network is, you just can't blast out a firmware update to your network gear at will. This leaves a good percentage of network systems that are "untouchable" for certain time periods. Routers have a bit more flexibility, but the physical switches that your systems are connected to cannot be taken down at will, or users will lose connectivity as flashing the device with new firmware requires that the system become unavailable for short time period (or longer time period depending on the device and software).

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Your Tenable Vulnerability Management trial also includes Tenable Lumin and Tenable Web App Scanning.

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