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Security

Applying Seccomp Filters at Runtime for Go Binaries

Seccomp (short for security computing mode) is a useful feature provided by the Linux kernel since 2.6.12 and is used to control the syscalls made by a process. Seccomp has been implemented by numerous projects such as Docker, Android, OpenSSH and Firefox to name a few.

In this blog post, I am going to show you how you can implement your own seccomp filters, at runtime, for a Go binary on your Dyno.

Why Use …

Announcing ISO 27001, 27017, 27018 Certification and SOC2 Type I Attestation

Today we are proud to announce that Heroku has achieved several important compliance milestones that provide third party validation of our security best practices:

  • ISO 27001 Certification: Widely recognized and internationally accepted information security standard that specifies security management best practices and comprehensive security controls following ISO 27002 best practices guidance.
  • ISO 27017 Certification: A standard that provides additional guidance and implementation advice on information security aspects specific to cloud computing.
  • ISO 27018 Certification: Establishes
    • …

An Update on Redis Vulnerabilities and Patching

On May 10, 2018, we received notice about two critical vulnerabilities in Redis, both embargoed until this morning.

Upon this notice, our Data Infrastructure team proceeded to patch all internal and customer databases in response to these vulnerabilities. As of today, all customer databases have been patched successfully.

At Heroku, customer trust is our most important value – and we are grateful to have your trust in keeping a globally-distributed data fleet safe from …

Securing Dependencies for Rails 5.2 Active Storage

The Public Cloud Security (PCS) group at Salesforce partners very closely with Heroku engineering to review and advise on new product features across the platform, from infrastructure to applications. One of the most rewarding aspects about this partnership and working on this team for me is when we not only identify security concerns, but take an active role in building safe solutions.

Heroku recently announced support for Active Storage in Rails 5.2, which introduces the …

Ruby CVE-2017-17405: Vulnerability in Ruby’s FTP Implementation

At Heroku we consistently monitor vulnerability feeds for new issues. Once a new vulnerability drops, we jump into action to triage and determine how our platform and customers may be affected. Part of this process involves evaluating possible attack scenarios not included in the original vulnerability report. We also spend time looking for “adjacent” and similar bugs in other products. The following Ruby vulnerability was identified during this process.

Vulnerability Triage

A vulnerability, CVE-2017-8817, …

A House of Cards: An Exploration of Security When Building Docker Containers

Containers, specifically Docker, are all the rage. Most DevOps setups feature Docker somewhere in the CI pipeline. This likely means that any build environment you look at, will be using a container solution such as Docker. These build environments need to take untrusted user-supplied code and execute it. It makes sense to try and securely containerize this to minimize risk.

In this post, we’re going to explore how a small misconfiguration in a build environment …

Using HTTP Headers to Secure Your Site

Observatory by Mozilla helps websites by teaching developers, system administrators, and security professionals how to configure their sites safely and securely.

Let's take a look at the scores Observatory gives for a fairly straightforward Static Buildpack app, https://2017.keeprubyweird.com.

Test Scores

Test Pass Score Explanation Content Security Policy ✗ -25 Content Security Policy (CSP) header not implemented Cookies ― 0 No cookies detected Cross-origin Resource Sharing ✔ 0 Content is not visible via cross-origin resource…

Meltdown and Spectre Security Update

UPDATE: Friday, January 5 19:07 PST

As of 13:30 PST, AWS completed their patch deployment addressing tenant isolation threats. AWS reports they have restored the expected multi-tenancy protections similar to dedicated hardware, which leaves Heroku to address the kernel vulnerabilities in runtime host operating systems.

Heroku Performance, Private, and Shield dynos feature varying degrees of isolation from potentially hostile neighbors. However, the shared Common Runtime carries our highest priority for Meltdown (variant 3) mitigation work …

Announcing Free and Automated SSL Certs For All Paid Dynos

We are happy to announce the general availability of Automated Certificate Management (ACM) for all paid Heroku dynos. With ACM, the cumbersome and costly process of provisioning and managing SSL certificates is replaced with a simple experience that is free for all paid Dynos on Heroku’s Common Runtime. Creating secure web applications has never been more important, and with ACM and the Let’s Encrypt project, never easier.

ACM handles all aspects of SSL/TLS certificates …

How We Found and Fixed a Filesystem Corruption Bug

As part of our commitment to security and support, we periodically upgrade the stack image, so that we can install updated package versions, address security vulnerabilities, and add new packages to the stack. Recently we had an incident during which some applications running on the Cedar-14 stack image experienced higher than normal rates of segmentation faults and other “hard” crashes for about five hours. Our engineers tracked down the cause of the error to …

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