build audit tools and apply rules at boot #724
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This is a minimal build of audit that gives us `auditctl` and the libraries it needs to parse and apply rules. In place of `auditd`, we have a service that loads a set of rules so that only SELinux events are logged. This configuration can be replaced by a suitably privileged container if necessary. Signed-off-by: Ben Cressey <bcressey@amazon.com>
If the audit subsystem is not explicitly disabled with "audit=0" on the kernel command line, it will be enabled by journald but left in an unconfigured state. Various events such as iptables changes will then be logged, and the performance cost can be significant. Our audit package contains a service to load audit rules at boot. Signed-off-by: Ben Cressey <bcressey@amazon.com>
iliana
approved these changes
Feb 12, 2020
tjkirch
approved these changes
Feb 12, 2020
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Issue #, if available:
N/A
Description of changes:
Builds
auditctland adds a service to load a minimal set of rules at boot, so that we log SELinux messages like AVC denials and nothing else.Testing done:
On a system built with these changes, these messages are logged.
On a system built with SELinux enabled, these messages are logged:
AVC denials are still logged:
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