On 24.05.2023 17:53, Paul Moore wrote:
On Wed, May 24, 2023 at 10:46 AM Steve Grubb <sgr...@redhat.com> wrote:
On Wednesday, May 24, 2023 7:37:27 AM EDT Rinat Gadelshin wrote:
Hello there.
It seems that the kernel doesn't send messages for syscalls of the shell
process from which auditd is installed.
Reproducing steps (performed on Ubuntu 22.04 x86_64 on virtual box by
`root`):
step #1: $ apt install auditd
step #2: $ auditctl -a always,exit -F arch=b64 -S openat,renameat2,unlinkat
step #3: $ echo t>delme;echo t2>>delme;cat delme;mv delme d;mv d
delme;rm delme
step #4: $ service auditd stop
step #5: $ ausearch -f delme
There are syscalls from /usr/bin/cat, /usr/bin/mv, /usr/bin/rm but there
are no any syscalls (openat expected)
for /usr/bin/bash (current shell process) for the file.
If step #3 is performed from another tty, then openat syscalls
(CREATE for the first echo and NORMAL for the second one)
is logged for the /usr/bin/bash process.
`uname -a` returns: Linux grin-vb-ubuntu-22-0-4 5.19.0-41-generic
#42~22.04.01-Ubuntu SMP PREEMPT_DYNAMIC Tue Apr 18 17:40:00 UTC 2 x86_64
x86_64 x86_64 GNU/Linux
Should I open an issue for the case at
https://github.com/linux-audit/audit-kernel ?
Are you booting with audit=1 ? If not, the install process and any before it
are not auditable. You will only get events for processes started after audit
enabled = 1.
It is also worth noting that some distributions (I'm not sure if this
applies to Ubuntu) effectively limit auditing with their default
runtime configuration, see the wiki page below for more information:
*
https://github.com/linux-audit/audit-documentation/wiki/HOWTO-Fedora-Enable-Auditing
Steve, Paul, thank you!
It make the situation completely clear to me =)
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