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Security in Context: The BeyondTrust Blog

Welcome to Security in Context

Bringing you news and commentary on solutions and strategies for protecting critical IT infrastructure in the context of your business.

sudo authentication bypass when clock is reset

Posted March 7, 2013    Rod Simmons

A recent discovery by a German researcher, Marco Schoepl, found that it is possible for a user to bypass sudo authentication by resetting the clock. To read more about this vulnerability see the articles on seclist.org and threatpost.com. What we have found is that many highly secure customers have already adopted the timestamp_timeout=0 setting which will bypass the default 5 minute password reentry interval and requires authentication for each command.

clock-resetYou could consider this vulnerability a configuration issue but it does highlight a general need to use a solution that provides an option for IO logging. Our PowerBroker Unix & Linux solution is a Command Control solution that also provides a method to perform IO Logging so you can replay a user’s entire session, after all, once they have elevated permissions it becomes vital to securely log the actions of that user.

It is always possible to have a configuration issue in any security system due to flexibility and general complexity of building a secure system. The key principle is to only delegate the rights needed and perform IO logging along with multi-factor authentication as an additional safety measure.

If you require a Sudo replacement, or want to implement greater controls where compliance requires it, PowerBroker Servers can help. Learn more about PowerBroker Servers now!

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Failing the Security Basics: Backoff Point-of-Sale Malware

Posted August 22, 2014    Marc Maiffret

At the beginning of this month, US-CERT issued a security alert relating to a string of breaches that had been targeting Point of Sale (POS) systems. The alert details that attackers were leveraging brute forcing tools to target common remote desktop applications such as Microsoft’s Remote Desktop, Apple Remote Desktop, Splashtop and LogMeIn among others….

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Troubleshooting Windows Privilege Management Rules with Policy Monitor

Posted August 21, 2014    Jason Silva

When defining and testing PowerBroker for Windows rules for production or pilots, customers sometimes tell us, “I don’t think this policy / program is working.” This is usually a case of the policy not properly triggering because of the way the rule was created. A unique feature of PowerBroker for Windows compared to other solutions is a client-side…

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BeyondTrust Webcast: Darren Mar-Elia’s 4 Active Directory Change Scenarios to Track

Posted August 20, 2014    Chris Burd

In our latest webcast, we joined Darren Mar-Elia, CTO at SDM Software, to discuss best practices for Active Directory (AD) change management. Here are some key takeaways from the presentation, followed by a link to a full-length video of the presentation. Mar-Elia kicks things off with a critical insight: that the best AD change management…

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