Vulnerability in HTTP.sys Could Allow Remote Code Execution

It may not have a cool code name, but this is a very severe problem:

Vulnerability in HTTP.sys Could Allow Remote Code Execution

A remote code execution vulnerability exists in the HTTP protocol stack (HTTP.sys) that is caused when HTTP.sys improperly parses specially crafted HTTP requests. An attacker who successfully exploited this vulnerability could execute arbitrary code in the context of the System account.

As far as this applies to Octopus Deploy:

  1. The Octopus server/web portal uses HTTP.sys (as does IIS), therefore you'll need to ensure this patch is installed on your Octopus server
  2. The Tentacle agent software does not use HTTP.sys
  3. If you are deploying applications to IIS, or self-hosted web applications built with frameworks like Nancy SelfHost or WebAPI self host (which build on HttpListener which ultimately builds on HTTP.sys), you should patch those servers

Calamari: open sourcing Tentacle deployments

I wrote recently about the new deployment targets coming as part of Octopus 3.x, and I explained that we'd be turning Tentacle into a "shell":

From 3.0 onwards, think of Tentacle as a Windows-oriented version of SSH, except with support for both polling and listening modes. All it knows how to do is to execute PowerShell scripts, or transfer files. Everything else - the config transform stuff, the IIS stuff - will be PowerShell scripts that Octopus will ensure exist on the Octopus server prior to deployments executing.

That lead to a logical conclusion:

Now that we're decoupling Tentacle the communication channel from Tentacle the deployment engine, we gain a new possibility: all the scripts and deployment logic that Tentacle executes during a deployment can now be open sourced

Making this happen has been our main focus over the last couple of months, and has manifested as Calamari, the open-source, convention-driven deployment runner:

Calamari GitHub repository

Since we started, we've believed that deployment pipelines take a significant time investment and become critical to how teams operate. For that reason, it's very important to avoid vendor lock-in. Octopus has always been built on open/standard technologies, like NuGet and PowerShell, to minimize your dependencies on Octopus - open sourcing Calamari and all the conventions we use during a deployment is a natural evolution of that goal.

Calamari is a console application with a number of commands, for example:

Calamari deploy-package --package MyPackage.nupkg --variables Variables.json

The package is a NuGet package, and the variables JSON file looks like this:

    "MyVariableA": "My value A",
    "MyVariableB": "My value B"

Deployments now work like this:

  1. Octopus acquires packages and generates the variables file
  2. These are pushed to Tentacle
  3. Tentacle is told to run a PowerShell script which just invokes Calamari
  4. Calamari takes care of the deployment, and terminates

Now that Calamari is open source, it might help to answer any questions you had around what happens during a deployment on a Tentacle. For example, did you ever wonder what order conventions run in?


Or maybe you always wondered how Tentacle (now Calamari) calls PowerShell, and passes variables to it?

Calamari is published under the Apache license, and we'll continue to work on it in the open. One of my favourite features of this architecture is that you can fork the project, make your own changes, and then tell your Octopus 3.0 server to use your own Calamari package.

March 2015 Community Roundup

There has been so much goodness from our friends out there in the community this month.

First up is Gregor Suttie blogging about "One Week using Octopus Deploy" and his need for Blue/Green Deployments.

David Roberts snuck this gem in right at the end of Feb: OctoPygmy - a Chrome Extension customizing the dashboard to filter parts of the Octopus Deploy UI by Project Groups, Environments or Roles. We think it's a cool idea and if you're managing a large environment it's worth a look.

Over on the OPTEN blog, Tim Pickin has been running a series on their Octopus Odyssey, automating the deployment of a complex multi-tenant web application. Some good lessons and ideas in there.

You might remember Karoline Klever and her blog series from the last newsletter. She's done it again with the Octopus Deploy Lab, a set of exercises developed for a workshop to help get Octopus neophytes up and running.

Are you in London? If so, get along to the Zimbra Social Usergroup on the 1st of April to find out from Rich Else about how the Macmillan Cancer Support Community used agile, continuous delivery and Octopus Deploy to upgrade their online community platform.

Also while we're in London, Ed Andersen recently did a good post on the state of .NET web app cloud deployments.

Next up our friend Jason at Domain, recently used Octopus Deploy to help with a rather tricky AWS migration. MacGyver would be proud.

Last but not least, if you're in Chicago in April, get along to the Chicago Code Camp on the 18th. It looks like a fantastic program and Ian Paullin will be presenting an Intro to Octopus Deploy. So if you know anybody who needs that sort of knowledge, send them along.

Introducing Damian Brady

Damian Brady

My name is Damian Brady (Damo to avoid mixups with DamianM), and I joined Octopus Deploy very recently at the end of February 2015 as a Solution Architect. Prior to Octopus, I worked as a developer, business analyst, and trainer in a range of companies. Most recently, I spent 4 years being exposed to many varied teams and industries as a consultant at SSW. I cut a lot of code, but I also spent a lot of time introducing teams to better ways to work.

I became aware of Octopus less than a year ago, and it’s fair to say I was hooked straight away. It became a go-to tool for any development team I was involved with. I introduced it to clients, wrote internal tools that used its API, and spoke about it, repeatedly, at conferences. Joining the team at Octopus was a natural (albeit challenging) step.

I’m here primarily to help the development community get the most out of Octopus and improve their DevOps process. I’ve always loved pushing people to take that next step to get better software out faster, and this is a great opportunity to do that.

I’m also a Microsoft Visual Studio ALM MVP, so I’ll be spending a bit of time making sure there’s the best possible ALM story for Octopus and Microsoft devs.

Growing Octopus Part VII: Local or remote team members

This is part seven in a series of posts about how we're growing as a company. In this post I'll talk about some of the decisions we've struggled with when trying to decide whether to only hire locally, or to hire remote team members.

  1. Developer career paths
  2. How we work
  3. Compensation and career progression
  4. Interview process
  5. Laptop program
  6. Anti-harassment policy
  7. Local or remote?
  8. Everyone does support

Remote vs. REMOTE

When people talk about working remotely, one detail they often leave out is that they're usually still working with people in similar timezones, just not from the same office. Consider these two scenarios:

  • I live in Chicago and work remotely with a team in New York. Sometimes I schedule a call at 2:00 PM and they forget to turn up.
  • I live in Australia and work remotely with a team in New York. I was awake until 2:00 AM and they forgot to turn up.

There's a world of difference (literally!) between these two.

That was the case for me: I was in South Australia, working with teams in Victoria and NSW, and it worked just fine. Scott Hanselman has great advice for working remotely, but he's in a similar situation: he's in Portland, and most (I assume) of his team are in Seattle. Modern technology solves all the hurdles of remote work, unless the person on the other end of the call is asleep.

When I lived in London, and our team in London had to work with a team in Tokyo, it was a completely different story. When time zones don't overlap, it's too hard to have lots of conversations, so people are left out. Trust is very hard to build over distance; it's just too easy to assume that those people, who are impossible to contact and never around when you need them, are the villians, acting out of malice or incompetence (or both!), while you're the ones trying to do the right thing. Phil Haack gives an excellent explanation of this:

Everyone is the protagonist of their own narrative. And in this narrative, it's only natural to see ourselves as the proverbial "good guy" of the story. We tend to rationalize our own actions as necessary or positive, much like Walter White until (spoiler alert) the end of Breaking Bad.

When you're in the USA and considering hiring remotely, you get the whole population of the Americas before you really need to worry about timezones. Things are a bit different from Australia. There's pretty much no time that a person in Australia can talk to a person in New York between 9-5 in their local time zone, so someone will always need to be around at odd hours.

I liked working remotely, so I always planned to build a remote working company. But I lived in Brisbane. When it was time to bring on someone full time, it was just easier to find someone locally. Then we found another person in Brisbane, and another. When you bootstrap, those first hires are so critical; adding a remote aspect adds a whole new level of difficulty and risk.

Resistance is futile

Until now, we've concentrated our efforts on finding team members in Brisbane. Yet, Australia accounts for only about 15% of our customers; the vast majority are in the USA and UK. At some point, we'll need a US and UK presence to be able to provide deeper support to customers in those time zones. Eventually we're just going to have to do it.

Working with people in another timezone requires big changes to the way we work, and it's better to do this now, while we're small and it's easier to effect changes to our communication patterns before the way we currently work becomes more entrenched. We're already part-way there - most of the team work from home most of the time - but to work across timezones will be harder still.

We're hiring in the USA/Canada!

As of today, we're now looking for remote team members who live in USA or Canada, as well as in Australia. A few thoughts we have so far:

  1. We're limiting the countries so as to limit the legal work involved, and to make basic things like paying people easier. We might look for contractors initially, but at some point I imagine we'll need a legal US presence. Better if there's only two countries to deal with than 10.
  2. We'll fly new team members to Brisbane for a month to work alongside us. The hope is that this will help get them productive and build that initial understanding and empathy, before we add the remote aspect. We'll also bring them here once every 6 to 12 months to keep it up.
  3. We'll go big: instead of just one person, we'll probably look to bring on 3-4 in a short time period, just so that they can form their own team and be more autonomous (and have people to talk to during work hours).

Growing Octopus Part VI: Anti-harassment policy

This is part six in a series of posts about how we're growing as a company. In this post I'll talk about our anti-harassment policy.

  1. Developer career paths
  2. How we work
  3. Compensation and career progression
  4. Interview process
  5. Laptop program
  6. Anti-harassment policy
  7. Local or remote?
  8. Everyone does support

Anti-harassment policy

One of the nice things about a small company is that there aren't a lot of HR policies to follow. In fact, we really only have a leave policy (like Balsamiq's: take some), and this anti-harassment policy.

Our desire for an anti-harassment policy was driven by the excellent work by Ashe Dryden on why conferences need a code of conduct. She makes a great argument about why conferences need a code of conduct, even if there have been no problems in the past:

A Code of Conduct is a public statement that sets the ground rules for participating in an event. Our conferences boast attendees from all over the world, coming from many different backgrounds and experiences; our expectations of what is appropriate are not always in line with one another. A policy like this ensures that everyone is on the same page without any gray areas and even better, that there will be less rules-lawyering. The people most affected by harassing or assaulting behavior tend to be in the minority and are less likely to be visible. As high-profile members of our communities, setting the tone for the event up front is important. Having visible people of authority advocate for a safe space for them goes a long way.

If this applies at conferences, it should certainly apply in the workplace too. With that in mind, here's our anti-harassment policy:

Octopus Deploy is dedicated to providing a safe, harassment-free working environment for everyone.

We do not tolerate harassment in any form. To be clear, harassment includes but isn't limited to:

  • Physical violence, threats of physical harm, or verbal abuse
  • Offensive verbal comments about a person's gender, age, sexual orientation, disability, physical appearance, body size, race, or religion
  • Stalking, following, harassing photography or recording, inappropriate physical contact, and unwelcome sexual attention
  • Any other actions or words designed to intimidate, denigrate or insult specific people or a group of people
  • Sexual language and imagery is not appropriate for any workplace or work-related activity, including in the office, via chat, email, in training events, or at parties.

This policy applies to all employees, office holders, contractors, consultants, guests, partners, vendors and volunteers.

If a person engages in harassing behaviour, managers or directors may take any action they deem appropriate, including warning the offender or termination.

If you are being harassed, notice that someone else is being harassed, or have any other concerns, please contact Paul (my number), Sonia (her number), or your manager. We will be happy to help contact the police, record any complaint, arrange alternative work routines, or otherwise assist those experiencing harassment to feel safe.

Introducing Shane Gill

Damian Maclennan

My name is Shane Gill, I joined Octopus Deploy in October 2014 as a test engineer. My previous experience has been focused on helping small businesses ship software. I have worked in a range of industries, most recently creating Minecraft plugins.

I wanted to work at Octopus Deploy because I was inspired by the culture and values that ooze from everything Octopus. Organic growth, customer focus, transparency and work-life balance are cliches often used but rarely applied. Octopus delivers in all respects, the team embodies these values and the customer really is number one. The focus on being good to people is evident in the awesome product.

I was hired at Octopus to help reduce the number of releases per version. If you are a developer, you would be familiar with working your butt off, putting out a new version and then getting hammered by your users with a long list of bugs and faults that your development process did not pick up. Release after release of patches and fixes ensues (along with the stress of support and the feeling of letting your users down). My initial mission was to ease that pain with the Tentacle Army.

In addition to raising armies of tentacles I am the brewer of the infamous OctoAle. Tweet @tothegills for the secret recipe.

Growing Octopus Part V: Laptop program

This is part five in a series of posts about how we're growing as a company. In this post I'll talk about our laptop program, which lets new team members pick the hardware that works best for them. Rather than just describe the policy, I thought I'd just post the policy as-is.

  1. Developer career paths
  2. How we work
  3. Compensation and career progression
  4. Interview process
  5. Laptop program
  6. Anti-harassment policy
  7. Local or remote?
  8. Everyone does support

Laptop program

Macbook Pro Retina

Great knowledge workers need great tools. Since we vary between working from home and working from an office, it's important to be able to have a computer that is portable and can be taken with you.

It's all too common to meet professionals who invest in great technology at home, but are forced to work with sluggish machines at work. Rather than have the company buy a fleet of laptops to give to people, I wanted to find a way to balance three goals:

  1. You should be able to pick the laptop/device that works best for you
  2. You should own it, not the company
  3. You shouldn't be out of pocket - the company should pay for it

Picking your laptop

You are a professional, and you are smart, and we trust you. You're intrinsically motivated to do great work because you take pride and derive great satisfaction in what you do, and you know the hardware that fits the way you work best. Perhaps you love the sleek look of a Macbook Pro. Maybe you prefer a touch screen. We trust you to pick the right hardware for you, because we know you'll pick whatever enables you to do your best work.

That said, we do have a few requirements/limits:

  • Maximum budget: AUD$4400 not including GST
  • It needs to be fast and powerful enough to do the work you need to do (compiling code, etc.).
  • You need a warranty that will cover the laptop and any repairs it may need for at least two years (this needs to be included in the price)
  • It needs to be new, not second-hand

We prefer to buy directly from the manufacturer (Apple, Lenovo, etc.) so we'd suggest shopping at their online stores rather than going to the local computer store. Once you've configured the system to your exact needs, send a quote to me and Octopus will purchase it and arrange for it to be delivered to you.

How it works

Any individual can salary sacrifice a laptop by working with their employer - the idea is that the employer purchases the laptop on your behalf, taking it out of your pre-tax salary. It's then yours to own. But the downside is that since it comes out of your salary, you're out of pocket.

To avoid being out of pocket, our program works like this:

  1. We increase your salary by CostOfLaptop / 2. I.e., for a $4,400 laptop, that's $2,200 per year
  2. You choose the laptop you want, we purchase it on the Octopus Mastercard, and ship it to your address
  3. We treat it like a salary sacrifice, by deducting CostOfLaptop / 24 from each month's pay. Two years later it is repaid.

The end result is that you end up with a new laptop, but it never comes out of your agreed salary, because we increase your salary and then salary sacrifice it back. Octopus has paid for it, but you own it.

Tax and other issues

When we purchase the laptop, the GST is claimed by Octopus. The total value that you salary sacrifice (and that we increase your salary by) is the after-GST portion. The salary sacrifice portion is pre-tax.

The ATO allow individuals to salary sacrifice one laptop and/or phone per year, as long as its used for your employment (even if you also play World of Warcraft on it at nights). This article has more details on what can and can't be salary sacrificed. Note that this means that if you already salary sacrificed a laptop under your previous employer, you might not be able to participate in this program until the next tax year (you should talk to your accountant).

It goes without saying, but as with all tax related issues, you should talk to your accountant about any of this before proceeding.

Note that when it comes to depreciation, some accountants will give different advice. Some may say it's fine to claim depreciation in your tax return since you own the laptop; others may say that the ATO doesn't allow it and that it's double dipping (since you already got the laptop tax-free since the sacrificed amount is pre-tax). Whether you claim depreciation is totally a matter for you and your accountant to figure out (smile)


You can replace the laptop every two years - effectively the laptop will have been "paid off" in that time, so you're free to either keep using it, or get a new one under the program.


The laptop belongs to you, so if it's stolen, defenestrated, or falls down a well, it's your responsibility to find a replacement. It's a good idea to call your home and contents insurance provider to ensure the laptop is covered.


If you happen to leave (we hope you never leave!) before the two years have passed since purchasing the laptop, the remaining balance from the salary sacrifice will be deducted from the final pay slip. If the laptop is relatively new and in good condition, at our discretion we may agree to take the laptop in lieu of the final balance.


To help put this into concrete terms, here's an example:

  1. Roger joins in January and uses the program to order a laptop, with an after-GST value of $4400 on 1st January
  2. His yearly salary increases by $2,200 ($183.33 per month)
  3. The laptop is purchased on his behalf by the company, and is delivered to his address in time for him to start
  4. $183.33 is salary sacrificed from his wage each month, to repay the laptop. His pay slip looks like this:
    Salary $X + 183.33
    Deduct laptop salary sacrifice: $183.33
    Gross pay: $X
  5. Roger leaves to start his own business; his last day is 1 July
  6. In the 6 pay runs between his start and end date, $183.33 x 6 has been paid back ($1099.98)
  7. In his final pay run, the final balance of $3300.02 is deducted from the final payout figure
  8. Roger keeps the laptop

Additional hardware budget

Our laptop program covers the purchase of the laptop, and any software, warranties or other items that you buy at the same time from the laptop vendor. However, you might need other items, either to help work from home or from the office. Examples are headsets, cameras, keyboards, and so on.

Everyone has a budget of $400 per financial year, per person, to spend on these items. You can either buy them yourself and then send an expense claim to us for reimbursement, or we can buy them for you.

Introducing Damian Maclennan

The Octopus Deploy team has grown considerably in the last year, but because we've been a bit head down working on the product it's been a while since we've posted an update on the blog about who's who.

Over the next couple of weeks we're going to fix that and introduce you to the newer members of the team.

Damian Maclennan

My name is Damian Maclennan, I joined in September last year as CTO. If you read our newsletter last week then you've seen something by way of introduction to me. I've been close to Octopus as a product since its inception, having worked alongside Paul as a consultant with Readify. I spent nearly 6 years there helping teams be agile and ship better software through better agile practices, software design and automation.

Automation has always been a bit of a passion of mine, having championed build and deployment automation since the early 2000s in digital agencies, often a very uphill battle.

I'm at Octopus to do a number of things; grow the team and our development processes as well as get more people using Octopus by reaching out to people in the community to help them be successful.

My other technical interests are scalable distributed architectures, typically messaging based. I'm one of the instigators of a .NET messaging framework called Nimbus. I blog (all too infrequently like most people) and Tweet @damianm.

February Community Roundup

One of the really cool things about having a product like Octopus Deploy is when customers start to write their own blog posts about it. We're going to start putting together a list of those posts so that you can see what other people are doing around the world.

This is a roundup of what happened in February (a few days late I know).

IANA Assignment

Firstly though, we had a "wow, that's cool" moment recently when IANA officially recognized our tentacle communications port (10933).

In the community

We're not the only ones that have been busy lately. Some of our awesome customers have been writing blog posts about their success with Octopus Deploy.

We have to give a big shout out to Karoline Klever, who has written a series of posts about introducing Octopus Deploy to her organisation and all their customers. Sounds like a great journey! Also on the topic of culture change, Martyn Frank has blogged about his experiences with team culture with the introduction of Octopus and automation.

Our friend Ian Paulin has continued his postings on the changes in Octopus with a great summary of what's happening in 3.0.

Gregor Suttie also has started giving Octopus Deploy a Test Drive, we're looking forward to some more posts there.

Finally David Roberts has released a Google Chrome extension called OctoPygmy to customise the interface and do some filtering and grouping of environments and the dashboard. Looks very cool!

So that's the February roundup, look out for the next one in a few weeks!