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content/posts/docker-hardening.md
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@ -99,7 +99,7 @@ After ensuring root isn't used in your containers, you should look into setting
Gaining privileges in the container will be much harder that way. Gaining privileges in the container will be much harder that way.
### Capabilities ### Capabilities
Furthermore, we should mention capabilities: root powers are divided into distinct units by the Linux kernel, called capabilities. Each granted capability also grants privielege and therefore access to a significant amount of attack surface. Security researcher Brad Spengler enumerates [19 important capabilities](https://forums.grsecurity.net/viewtopic.php?f=7&t=2522#p10271). Docker **restricts certain capabilities by default**, but [some of the most important ones](https://github.com/moby/moby/blob/1308a3a99faa13ff279dcb4eb5ad23aee3ab5cdb/oci/caps/defaults.go) are still available to a container by default. Furthermore, we should mention capabilities: root powers are divided into distinct units by the Linux kernel, called capabilities. Each granted capability also grants privilege and therefore access to a significant amount of attack surface. Security researcher Brad Spengler enumerates [19 important capabilities](https://forums.grsecurity.net/viewtopic.php?f=7&t=2522#p10271). Docker **restricts certain capabilities by default**, but [some of the most important ones](https://github.com/moby/moby/blob/1308a3a99faa13ff279dcb4eb5ad23aee3ab5cdb/oci/caps/defaults.go) are still available to a container by default.
You should consider the following rule of thumb: You should consider the following rule of thumb:
- Drop all capabilities by default. - Drop all capabilities by default.