I’ve mentioned before, and many of you have lived through, the slowly changing beliefs around DevOps versus security. We are past the days of “Security slows us down” and into “How can we bake security into the development process?” which is essential. Indeed, I would say it’s more essential every day as the number of threat actors and their use of automation to perform more attacks increases.

So where can we slip in a little security to protect those sweet, innocent apps from the Big Bad Wolf? Let’s make a list, then chat about it.

• Source code
• Inclusions–libraries, shared objects, etc.
• Container/cloud images
• Network
• Running applications and APIs

This is honestly not an exhaustive or detailed list, but we’re writing a blog here, so let’s stop there so we have time to discuss.

Source code security is greatly enhanced by putting in any of a dozen development security tools, which include static and dynamic security scanners along with a variety of other features.

Inclusions are often nested and confusing. A mod that developers include relies on other mods and libraries—sometimes so many that the developer can’t even list them all. So, this type of security starts with software composition analysis (SCA), then uses the list that generates to pursue vulnerabilities—normally by looking for the included libraries in a vulnerability database. Several prominent source code security solutions bundle at least the SCA part, and some also help nail down included vulnerabilities. Check with your vendor if you’re just getting started here.

Container images are akin to the “golden images” of old. Build one that has what most applications need, add on the security that an organization wants most applications to support and then have every project start there and only add what this specific app needs. That allows for scanning of the base image so all applications start out at least somewhat secure. Cloud images can be done much the same, but beginning at a higher level. Look into registry security or image scanning tools to meet this need. It is worth asking your source scanning vendor if they offer this functionality; some do.

The network on which an application will be exposed needs to be locked down. While the access points into the org probably are protected, portability of applications means that the application itself should be locked down wherever it uses that network. Tools are specific to the platform and networking in use, so look into it—I can’t offer much more generic advice.

Security has long tried to lock down running applications—generally with pushback from developers and even ops, a bit. Between web application firewalls (WAFs) and API security, we have the ability to stop a whole host of attacks on their way in … But you have to use WAFs and API security best practices. If you’re starting from scratch, consider tools in the application and API security space that protect against both the web UI and API attacks with a breadth of technologies. For those with a WAF, look at API security tools that protect APIs. For those with API security covered, consider a next-generation WAF.

My usual encouragement applies. You are rocking it, and all of these tools are increasingly integrated into the DevOps toolchain, so it’s worth the time investment to get them set up and let them run. If you’re just starting out, start with source code security. Honestly. It will make the overall app more secure by tightening its source. But don’t ignore the ops side, as that is part of the attack surface. Protect those apps you built and/or maintain that are keeping the org running.