[apparmor] [Bug 1117804] Re: ausearch doesn't show AppArmor denial messages
Jarkko Toivonen
1117804 at bugs.launchpad.net
Tue Jan 2 13:51:58 UTC 2024
Any news on this? It has been open for over ten years now. AppArmor is
on by default on Ubuntu, and if auditd is used, then the events are
logged using it. Isn't it a security bug if the events don't show up
when queried using ausearch?
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https://bugs.launchpad.net/bugs/1117804
Title:
ausearch doesn't show AppArmor denial messages
Status in AppArmor:
Confirmed
Status in audit package in Ubuntu:
Confirmed
Status in linux package in Ubuntu:
Incomplete
Bug description:
The following command should display all AVC denials:
ausearch -m avc
However, it doesn't work with AppArmor denials. Here's a quick test
case to generate a denial, search for it with ausearch, and see that
no messages are displayed:
$ aa-exec -p /usr/sbin/tcpdump cat /proc/self/attr/current
cat: /proc/self/attr/current: Permission denied
$ sudo ausearch -m avc -c cat
<no matches>
ausearch claims that there are no matches, but there's a matching
audit message if you look in audit.log:
type=AVC msg=audit(1360193426.539:64): apparmor="DENIED"
operation="open" parent=8253 profile="/usr/sbin/tcpdump"
name="/proc/8485/attr/current" pid=8485 comm="cat" requested_mask="r"
denied_mask="r" fsuid=1000 ouid=1000
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