Browsing Posts published on May 11, 2008
There are new developments in the case of the counterfeit Cisco routers, which we have been discussing for some time. The NYTimes updates the story after an FBI PowerPoint presentation made its way onto the Web. It seems that experts at Cisco have examined some of the counterfeit routers in detail and proclaimed that they contain no back doors. Others don’t believe we can be so sure. “Last month, [DARPA] began distributing chips with hidden Trojan horse circuitry to military contractors who are participating in the agency’s Trusted Integrated Circuits program. The goal is to test forensic techniques for finding hidden electronic trap doors, which can be maddeningly elusive… The threat was demonstrated in April when a team of computer scientists from the University of Illinois presented a paper at a technical conference in San Francisco detailing how they had modified a Sun Microsystems SPARC microprocessor… The researchers were able to create a stealth system that would allow them to automatically log in to a computer and steal passwords.”
IBM Developerworks’ recent analysis of how the NSA built SELinux to withstand attacks. The article shows us some of the relevant kernel architecture and compares SELinux to a few other approaches. We’ve discussed SELinux in the past. Quoting: “If you have a program that responds to socket requests but doesn’t need to access the file system, then that program should be able to listen on a given socket but not have access to the file system. That way, if the program is exploited in some way, its access is explicitly minimized. This type of control is called mandatory access control (MAC). Another approach to controlling access is role-based access control (RBAC). In RBAC, permissions are provided based on roles that are granted by the security system. The concept of a role differs from that of a traditional group in that a group represents one or more users. A role can represent multiple users, but it also represents the permissions that a set of users can perform. SELinux adds both MAC and RBAC to the GNU/Linux operating system.”
Because you were probably just thinking that your choices on operating systems were feeling a little limited.
