Preface

The TCP/IP protocols were conceived during a time that was quite different from the hostile environment they operate in now. Yet a direct result of their effectiveness and widespread early adoption is that much of today's global economy remains dependent upon them.

While many textbooks and articles have created the myth that the Internet Protocols (IP) were designed for warfare environments, the top level goal for the DARPA Internet Program was the sharing of large service machines on the ARPANET. As a result, many protocol specifications focus only on the operational aspects of the protocols they specify and overlook their security implications.

Though Internet technology has evolved, the building blocks are basically the same core protocols adopted by the ARPANET more than two decades ago. During the last twenty years many vulnerabilities have been identified in the TCP/IP stacks of a number of systems. Some were flaws in protocol implementations which affect only a reduced number of systems. Others were flaws in the protocols themselves affecting virtually every existing implementation. Even in the last couple of years researchers were still working on security problems in the core protocols.

The discovery of vulnerabilities in the TCP/IP protocols led to reports being published by a number of CSIRTs (Computer Security Incident Response Teams) and vendors, which helped to raise awareness about the threats as well as the best mitigations known at the time the reports were published.

Much of the effort of the security community on the Internet protocols did not result in official documents (RFCs) being issued by the IETF (Internet Engineering Task Force) leading to a situation in which "known" security problems have not always been addressed by all vendors. In many cases vendors have implemented quick "fixes" to protocol flaws without a careful analysis of their effectiveness and their impact on interoperability.

As a result, any system built in the future according to the official TCP/IP specifications might reincarnate security flaws that have already hit our communication systems in the past.

Producing a secure TCP/IP implementation nowadays is a very difficult task partly because of no single document that can serve as a security roadmap for the protocols.

There is clearly a need for a companion document to the IETF specifications that discusses the security aspects and implications of the protocols, identifies the possible threats, proposes possible counter-measures, and analyses their respective effectiveness.

This document is the result of an assessment of the IETF specifications of the Internet Protocol from a security point of view. Possible threats were identified and, where possible, counter-measures were proposed. Additionally, many implementation flaws that have led to security vulnerabilities have been referenced in the hope that future implementations will not incur the same problems. This document does not limit itself to performing a security assessment of the relevant IETF specification but also offers an assessment of common implementation strategies.

Whilst not aiming to be the final word on the security of the IP, this document aims to raise awareness about the many security threats based on the IP protocol that have been faced in the past, those that we are currently facing, and those we may still have to deal with in the future. It provides advice for the secure implementation of the IP, and also insights about the security aspects of the IP that may be of help to the Internet operations community.

Feedback from the community is more than encouraged to help this document be as accurate as possible and to keep it updated as new threats are discovered.

He’s a bit indignant that so much energy goes to sporting events like the Olympics rather than more important news that isn’t getting reported around the world.

This is in a year when tons of journalists are getting laid off.

This is in a year when there are tons of stories around the world that aren’t getting reported on.

Could we take half of those photographers and send them to Russia, for instance

Reminds me of a feeling I had back in college as an undergrad student studying social sciences and humanities, about the way my friends who were physicists interacted with the world. They were so awed by the stars, Mars, astrophysics, and it seemed to me interesting but altogether unimportant. They argued they may find something outside our planet that could help solve Earth-bound problems like disease, or find the origins of earth and humanity — but really they were doing it because they loved it. One of my friends had a good argument, though — there are enough people right now that we can specialize in what we care about, and there will still be others covering other topics. He could be a physicist and look into the universe’s origin, while I studied social interaction and writing, and our other friends looked into solving cancer or eradicating invasive plants in the native wetlands. We have to specialize, and there are enough of us to do it too.

I think it’s the same way in journalism — whether it’s sports, celebrity journalism, or coverage of politics and war, there are a lot of opportunities right now for journalists. Of course the business model is changing, and some old-schoolers won’t know how to roll with that, but generations change slowly; we’re learning.

Also, the Olympics is seen as more than a sporting event, it’s also a symbol of world competition and cooperation too — a way for countries to come together and share entertainment globally. I think that’s worth covering.

In the second post, Robert Scoble says there are plenty of great journalists but the public doesn’t care. In some ways I have to agree with that, but I don’t think it’s negative, necessarily. I had a conversation with someone the other day about world news reportage. He says, “I was just reading this story, but what does it matter to me if there’s a flood in some city in another country I’ll never visit and some farmer lost his sheep?” World news is only important when it’s relevant, so it’s no wonder that many people don’t care — if they don’t know much about the area, and it doesn’t affect them, they have no incentive to give it full attention. You can call that apathy, but I think it’s an important selectivity skill that humans have. We have to choose what to give priority to, so if nothing stands out as being particularly important, we just ignore it or gloss over it. Human nature…

Also I think the common person today just gets desensitized and doesn’t know where to turn their energy, when surrounded by so many crises. Either you focus on one specialty and do your best to work toward one cause in your life — and maybe that’s just in the course of your daily work — or you become a complete Attention-Deficit-Disorder case and bounce from one problem to the next, without knowing how to solve anything. That just causes a sense of bewilderment, despair, and either that bogs you down or eventually you get desensitized.

There’s a commenter on Scoble’s blog, Spencer, who talks about this generation’s apathy. There are so many people who want to blame today’s generation or the young generation for this “apathy” that they sense. But I see it as a survival mechanism that arises from the way information flows these days. We’re surrounded by crises, everyone wants us to know about them — the water shortage, global warming, death in Iraq, the national deficit. Okay, crisis, I get it. But no one gives a real clear idea on what any individual is really supposed to do to solve the problem. You can’t get involved with one global cause, without ignoring all the others, and if you do get involved it’s likely to become your life’s purpose. Most people are concerned with other things — their families, their work, personal development, their homes and futures, and really that’s enough to take up all their time.

I’m always amazed when I read about the early unionists. Emma Goldman for example, the activist who pushed for the 8-hr workday, and campaigned for free love in the early 1900s when women were still wearing corsets, used to work 16 hour factory days as a seamstress, then lead meetings late into the night. Today we lead cushy lives comparatively–8 hour days, plus commute and lunch, family time, dinner time, gym maybe, sleep… but it still doesn’t seem like we ever have enough energy and time.

What Emma had that most people today don’t, is a community living in the same conditions as herself, with clear goals about what they were campaigning for, and a cause that affected their own daily lives. Today, unionism and local activism is in much shorter supply, in part due to the many people who work fairly comfy desk jobs, and the problem that everyone has his own specialization, works in a cubicle, does his or her own thing. The problems we’re facing today in terms of global warming, global water shortage, aren’t the same kinds of problems that activists have fought for in the past, and there’s no clear road map for how to solve them. Our leaders sure aren’t leading the way.

What we do have, at least, is the Olympics, which is an age old symbol of international cooperation, play and competition…so, uh, go sports! As for full disclosure, I don’t actually have a TV and haven’t watched the Olympics in many years, but I do try taking short showers–does that help?

he Court of Federal Claims that first heard the case threw it out, and the new Appellate ruling upholds that decision. The reasoning behind the decisions focuses on the US government's sovereign immunity, which the court describes thusly: "The United States, as [a] sovereign, 'is immune from suit save as it consents to be sued . . . and the terms of its consent to be sued in any court define that court's jurisdiction to entertain the suit.'"

In the case of copyright law, the US has given up much of its immunity, but the government retains a few noteworthy exceptions. The one most relevant to this case says that when a government employee is in a position to induce the use of the copyrighted material, "[the provision] does not provide a Government employee a right of action 'where he was in a position to order, influence, or induce use of the copyrighted work by the Government.'" Given that Davenport used his position as part of the relevant Air Force office to get his peers to use his software, the case fails this test.

But the court also addressed the DMCA claims made by Blueport, and its decision here is quite striking. "The DMCA itself contains no express waiver of sovereign immunity," the judge wrote, "Indeed, the substantive prohibitions of the DMCA refer to individual persons, not the Government." Thus, because sovereign immunity is not explicitly eliminated, and the phrasing of the statute does not mention organizations, the DMCA cannot be applied to the US government, even in cases where the more general immunity to copyright claims does not apply.

It appears that Congress took a "do as we say, not as we need to do" approach to strengthening digital copyrights.

Q1: How do you handle variety of log sources? There are so many, almost beyond my capability.

A1: Sorry to ponder the meaning of "is" here, but what is meant by "handle"? It is really not that hard to collect logs from a large number of diverse sources (as long as the logs can be delivered via syslog or exist as files and can be collected). Now, there will certainly be challenges  when the volume of logs gets large, but if by "handle" you mean "collect + store", it is really not that hard, given the right tools. Now, if "handle" means "make sense of what all those logs are trying to tell you," it is a different story altogether.

Q2: You talked about the importance of logging; however for an intermediate or novice admin what are the starting steps .. what are the minimal logs they should start at once?

A2: Answered in "Log Management - Day 1" If you want a simple list of things to "enable today,"  I cannot really answer it since I know neither your needs, nor your environment. In other words, this is the "what is the meaning of life question?" :-)

Q3: What regulations, rules or guidance exist regarding sharing or visibility of logs to users?

A3: PCI DSS says in Requirement 10.5:  "Secure audit trails so they cannot be altered.
10.5.1 Limit viewing of audit trails to those with a job-related need
10.5.2 Protect audit trail files from unauthorized modifications
10.5.3 Promptly back-up audit trail files to a centralized log server or media that is difficult to
alter"

NIST guidance for FISMA also says something similar (for example, look in NIST 800-92 doc). Overall, log protection and security are mentioned in many other regulations as well.

Q4: Privileged groups membership monitoring in AD one of the most important from my point of view. However I did not find effective way to monitor/report on changes in those groups. Any recommendations?

A4: This is indeed a tricky one which might take more space to answer than I have here; it might also take you 'beyond logs.' One good source of information is Randy Smith's site and, specifically, his webinar on 'Active Directory "Logging Gap"' (here somewhere) - which covers how to audit things of that sort when then native logging is not sufficient.

Q5: How I can learn what exactly I need to log?

A5: OMG, this is a $1,000,000 question :-) Let me answer "how can I learn" part and not the "what exactly I need to log part,"  (also see discussion on "MUST-DO Logging for PCI?") as it is actually answerable. To learn what you need to log, first ask "Why?" (and then see this) - basically establish what you want to accomplish with logs, catalogue your systems, figure how to tweak the logging knobs - and then do it!

Q6: How granular should logging be? What is your recommendation for enterprise servers like domain servers and Windows servers?

A6: Again, too long to answer here in details (it will become a subject of a longer blog post later), but some pointers follow: here for Windows (MS site also have a few recommendations on audit policies)

Q7: What is "more control" and what is "less control" that you mention in the webcast? Can you give an example?

A7: OK, I did say that "sometimes when you implement more controls, you actually have less control." What do I mean? If you buy a firewall (a network security control) and then - over time, of course - configure it with 7800 rules (!) that are supposed to give you control over who can and cannot access your network, you will not gain control over your environment. You will actually be less in control of who is touching your network, compared to, say, having only 20 rules.

Q8: What about mandated NIST controls for government systems? Auditing is a specific control for Moderate and High risk systems. What list of events do you recommend for auditing?

A8: This is too long to answer here, but NIST 800-92 Guide is a really good source of such info ("Guide to Computer Security Log Management [PDF]") Also, see my presentation on NIST 800-92 Guide in the Real World.

Q9: The issue that many organizations get stuck on, is the monitoring process, and defining what exceptions to monitor for? Is there guidance / framework for this? How much of it is system specific and how much is applicable generally to all systems?

A9: I outlined some general ideas back in 2004 via this presentation (note to self - update that to be more 2008-relevant); it is mostly general, but also has pointers to specific system. Keep in mind that it is focused on security, not operational monitoring (which is often no less important - in fact, often MORE important)

Enjoy! Sorry for being brief with some of the answers - I am woefully late with this even as they are...

Other questions that I answered in the past:

• More Log Management Questions - Answered!
• Some Burning Logging Questions - Answered!

“Actually, it is fair to say that some of CEP can be found in other disciplines. Event processing has been going on in one form or another, for the past 50 years. Simulation, Networking, Active DBs, Middleware.

{ …. }

CEP has only just begun. The foundations are unexplored. Its an open field of research issues.”

Actually, on slide 12 of this presentation from 2006 Processing Patterns for PredictiveBusiness, we show that the foundations for complex event processing have been in place for many years and in many disciplines such as multisensor data fusion, control theory, sensor management, planning, correlation, estimation, tracking, information fusion, data fusion, data mining and more.

One obvious problem (or at least obvious to many of us) with the current group think marketing CEP is that many have ignored the established foundations for event processing and complex event processing that have been mature for many decades. It is not very efficient (nor good for customers) to pick a phrase, or concept, like “CEP” and ignore the relevant mulitiple disciplines that have been used to solve complex classes of distributed event processing problems for decades.

Therefore, “CEP has only begun” is only true for those who have ‘drank the CEP koolaid” and do not understand (yet) that they are “reinventing the event processing wheel” and ignoring (by accident or purposely, I have no idea of the motives) the prior-art and/or selectively picking the prior art or research associated with their company, byline, favorite researcher, CEO, etc. This is a fundamental issue (and constraint) with CEP, in my opinion. Complex event processing does not stand alone as an art or a science, nor should it, nor should it be based on single dimensional, or small groups of single dimensional, technologies.

If you want to see many of the foundations of CEP, you don’t need to go much further than slide 12 of this  presentation from 2006, Processing Patterns for PredictiveBusiness.

Based on my observation, it reminds me of a small group of folks on a discovery mission where their ship lands on the shore of a distant land and they call this “new land” — “CEP” because they feel they have discovered a new land.  Nevermind the big cities that already exist or the many people already “in the fields” of their new land.  These ”CEP explorers” are seemingly in some kind of modern day epic struggle to define themselves as “discoverers” or “founders” and they are coming up with new names of the lakes, rivers, streams and mountains that defined the landscape long before their ship arrived.

Note: It is encouraging to see folks slowly “catching up”…. maybe in a few years we will move CEP beyond the “not invented here” mind share that we see today.

Also note that, recently we saw a flurry of posts where many people rightly stated that “CEP was overhyped” - but then in rebuttal the EPTS community leaders came back with “Is CEP a mere hype?” or “Is CEP a hype?”. spinning the discussion to an extreme position that is wildly different than “CEP is Overhyped”.   

I realize that security is a system level issue and it takes a long time to change things at that level, but what's more concerning to me is that the typical infosec mindset remains the same. Should we be surprised by rampant phishing and fraud? I am frankly surprised the numbers are so low given the opportunities that the attackers have via the glacial pace of security improvements. Its been three years since that list and I could write the same exact one today for SOAP, REST, SOA, Web 2.0 whatever. Maybe the main reason, beyond failure of imagination, why infosec is so far behind developers is that infosec lacks tools. Developers automate everything possible. Security doesn't. The most promising thing about static analysis is not the ability to find everything, its the ability to find many important things in an automated way. Infosec needs to stop giving people fish and teaching people to fish. Look at Fortify's vulncat site which has a Taxonomy of Coding Errors. Fortify's Seven (plus one) pernicious kingdoms are:

Assuring the security of the MetroCard system is a multi-layered effort encompassing technical solutions and procedures aimed at preventing unauthorized access and detecting unauthorized activities during the course of normal operations. The activity of the system is monitored for unusual behavior at many points in the operation. Procedures are in place to quickly respond to unusual occurrences in ways that not only limit risk, but can lead to immediate remedial action. NYC Transit is in the process of completing an extensive effort to become compliance [sic] with Payment Card Industry (PCI) rules relating to credit/debit transactions. While directly related to the business of accepting bank cards, these rules have also helped NYCT further harden its automated fare collection system against potential unauthorized access to sensitive transaction information by hackers and employees. In regards to your security related questions, which we will not address here in any detail, it is safe to say network environment is constructed in such a way that the serious security implications and vulnerabilities you reference do not exist.