BeyondTrust

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!

Tags:
, , , ,

Leave a Reply

Additional articles

webinar1

On Demand Webinar: Advanced Windows Tracing

Posted April 17, 2015    BeyondTrust Software

Webinar: Security MVP, Paula Januszkiewicz, shows Windows administrators how to be more aware of what happens whenever somebody does something within the system.

Tags:
, ,
5

The Delicate Art of Remote Checks – A Glance Into MS15-034

Posted April 15, 2015    Bill Finlayson

Remote vulnerability detection – using ms15-034 as an example.

Tags:
, ,
databreach

2015 Verizon Data Breach Investigations Report: More End Users as Threats

Posted April 15, 2015    Scott Lang

The 2015 Verizon report says end users are the number one source of insider abuse incidents. Find out how to mitigate the risks.

Tags:
,