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Bundled Software and Attack Surface

Bundled Software and Attack Surface

• CERT/CC Blog
Will Dormann

Hi, it's Will. We are all probably annoyed by software that bundles other applications that we didn't ask for. You want a specific application, but depending on what the application is, where you downloaded it from, and how carefully you paid attention to the installation process, you could have some extra goodies that came along for the ride. You might have components referred to as adware, foistware, scareware, potentially unwanted programs (PUPs), or worse. Sure,...

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Investigating Advanced Persistent Threat 1

Investigating Advanced Persistent Threat 1

• CERT/CC Blog
Deana Shick

Hi this is Deana Shick and Angela Horneman from the Threat Analysis and Situational Awareness teams. In this post we introduce our recently published technical report Investigating Advanced Persistent Threat 1, which shows the value of combining several unclassified datasets to explore known indicators of compromise (IOC)....

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Why Cybersecurity Is Not Like the Immune System

Why Cybersecurity Is Not Like the Immune System

• CERT/CC Blog
Jonathan Spring

The idea of a cyber-immune system sometimes circulates through the community. It seems that such proposals either do not properly frame how the immune system works, how good computer security would work, or both. I'm going to try to put both of those in context in order to make clear why cybersecurity is not like the immune system, but why it would be nice if it were....

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10 Years of FloCon

10 Years of FloCon

• CERT/CC Blog
George Jones

Hi, this is George Jones, I was conference chair of the 10th annual FloCon Conference that was held in Charleston, South Carolina, January 13-16, 2014. Check out the FloCon proceedings to learn about the work presented, and consider participating in future FloCons....

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Taking Control of Linux Exploit Mitigations

Taking Control of Linux Exploit Mitigations

• CERT/CC Blog
Will Dormann

Hey, it's Will. In my last two blog entries, I looked at aspects of two exploit mitigations (NX and ASLR) on the Linux platform. With both cases, Linux left a bit to be desired. In this post, I will explain how to add further exploit protections to Linux....

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Differences Between ASLR on Windows and Linux

Differences Between ASLR on Windows and Linux

• CERT/CC Blog
Will Dormann

Hi folks, it's Will again. In my last blog entry, I discussed a behavior of NX on the Linux platform. Given that NX (or DEP as it's known on the Windows platform) and Address Space Layout Randomization (ASLR) work hand-in-hand, it's worth looking into how ASLR works on Linux. As it turns out, the implementation of ASLR on Linux has some significant differences from ASLR on Windows....

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Feeling Insecure? Blame Your Parent!

Feeling Insecure? Blame Your Parent!

• CERT/CC Blog
Will Dormann

Hey, it's Will. I was recently working on a proof of concept (PoC) exploit using nothing but the CERT BFF on Linux. Most of my experience with writing a PoC has been on Windows, so I figured it would be wise to expand to different platforms. However, once I got to the point of controlling the instruction pointer, I was surprised to discover that there was really nothing standing in the way of achieving code...

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Practical Math for Your Security Operations - Part 3 of 3

Practical Math for Your Security Operations - Part 3 of 3

• CERT/CC Blog
Vijay Sarvepalli

Hi, this is Vijay Sarvepalli, security solutions engineer in the CERT Division again. In the earlier blog entries for this series, I introduced set theory and standard deviation. This blog entry is about entropy, a physics principle that has made its way into many mathematical applications. Entropy has been applied in many informational science topics. In this blog post, I introduce a way to use entropy to detect anomalies in network communications patterns....

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