Narcissistic, Incredible, Completely Exceptional Logger of Access Denials
Nice-lad is a tool to collect and aggregate logs of access denials in system. The source of data are audit messages from DAC, Smack, Cynara and netfilter.
The purpose of nice-lad is to collect and normalize the selected audit logs and make them readable by unprivileged user. This might be helpful during debugging applications accessing restricted resources.
Nice-lad works as an audispd plugin.
Nice-lad was first introduced in July 2015.
| Name | Function | |
|---|---|---|
| Aleksander Zdyb | [email protected] | Developer, Maintainer |
The equivalent places, nice-lad can be obtained from:
Nice-lad, as an audisp plugin, is fed with audit events. It parses and filters them to obtain and aggregate information useful in context of logging of access denials.
At the moment, the supported subsystems are:
- DAC denials on given groups,
- Smack denials,
- Cynara denials,
- Netfilter denials (supported by Nether).
Nice-lad uses:
- libauparse to parse audit events,
- Security Manager (where available) to obtain resource groups to monitor,
- journald (where available) or syslog to put aggregated logs.
The package consists of following files (note, the exact paths are system-dependent):
- /etc/audisp/plugins.d/nice_lad.conf,
- /usr/sbin/nice-lad.
Provided, the above config file is present in audisp plugins directory, nice-lad is automagically activated, when auditing service is run. In order to disable nice-lad, while keeping audit running, one need to edit the config to contain "active = no".
Nice-lad will log access denials to journald (if available) or syslog with informational level. Below, are some examples:
Jul 10 10:11:04 HOSTNAME nice-lad: ACCESS DENIED ON SYSCALL syscall=open filename=/tmp/test exit=-13(Permission denied) gid=unknown(1234) object=test subject=_
Jul 10 10:11:09 HOSTNAME nice-lad: ACCESS DENIED ON SMACK object="test" subject="_" access=r
Jul 10 10:11:26 HOSTNAME nice-lad: ACCESS DENIED ON CYNARA client="test_client" user="test_user" privilege="http://tizen.org/privilege/account.read"
Jul 10 10:11:51 HOSTNAME nice-lad: ACCESS DENIED ON NETFILTER obj=User outif=eth0 proto=tcp saddr=10.0.2.16 sport=54460 daddr=198.145.20.7 dport=443
Nice-lad comes with a set of unit tests written in gmock. By adding new features or fixing bugs, please add or update tests.