Re: Additional parameter in PROCTITLE.proctitle when executing rm

From: Alan Evangelista <alan.vitor@gmail.com>
To: Ondrej Mosnacek <omosnace@redhat.com>
Cc: Linux-Audit Mailing List <linux-audit@redhat.com>
Subject: Re: Additional parameter in PROCTITLE.proctitle when executing rm
Date: Thu, 18 Mar 2021 17:12:19 -0300	[thread overview]
Message-ID: <CAKz+TUv5=YLqwT8vj4FKraheUXYE5eyhQ3q_9nhgsfj=YWBjFA@mail.gmail.com> (raw)
In-Reply-To: <CAFqZXNumrP64fXi1tKJ4NPYj8r1w5aZrjU0Vq2T2wJdCm5Kniw@mail.gmail.com>

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OM> Perhaps a shell alias? What does `type rm` say?

# type rm
rm is aliased to `rm -i'

Thanks!

On Thu, Mar 18, 2021 at 5:01 PM Ondrej Mosnacek <omosnace@redhat.com> wrote:

> On Thu, Mar 18, 2021 at 8:32 PM Alan Evangelista <alan.vitor@gmail.com>
> wrote:
> > I'm trying to audit commands run in bash, including the commands
> arguments. The proctitle parameter in the PROCTITLE record seems to be the
> most reliable source to get that, but it does not contain exactly the "rm"
> command I have typed on bash. Example:
> >
> > 1) rm /data/test2,txt -f
> >
> > type=SYSCALL msg=audit(1616095201.302:40381): arch=c000003e syscall=263
> success=yes exit=0 a0=ffffffffffffff9c a1=1b1f0c0 a2=0 a3=7fff3677a720
> items=3 ppid=15954 pid=3398 auid=201327714 uid=0 gid=0 euid=0 suid=0
> fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=2663 comm="rm" exe="/usr/bin/rm"
> key="filesystem_op"
> > type=CWD msg=audit(1616095201.302:40381):  cwd="/home/aevangelista"
> > type=PATH msg=audit(1616095201.302:40381): item=0 name="/data/test2.txt"
> inode=38030531 dev=08:11 mode=0100644 ouid=0 ogid=0 rdev=00:00
> objtype=NORMAL cap_fp=0000000000000000 cap_fi=0000000000000000 cap_fe=0
> cap_fver=0
> > type=PATH msg=audit(1616095201.302:40381): item=1 name="/data/" inode=64
> dev=08:11 mode=040755 ouid=0 ogid=0 rdev=00:00 objtype=PARENT
> cap_fp=0000000000000000 cap_fi=0000000000000000 cap_fe=0 cap_fver=0
> > type=PATH msg=audit(1616095201.302:40381): item=2 name="/data/test2.txt"
> inode=38030531 dev=08:11 mode=0100644 ouid=0 ogid=0 rdev=00:00
> objtype=DELETE cap_fp=0000000000000000 cap_fi=0000000000000000 cap_fe=0
> cap_fver=0
> > type=PROCTITLE msg=audit(1616095201.302:40381):
> proctitle=726D002D69002F646174612F74657374322E747874002D66
> >
> > The proctitle value  726D002D69002F646174612F74657374322E747874002D66 is
> equal to "rm-i /data/test2.txt -f" in ASCII. Where did this -i come from?
> Is it expected?
>
> Perhaps a shell alias? What does `type rm` say?
>
> --
> Ondrej Mosnacek
> Software Engineer, Linux Security - SELinux kernel
> Red Hat, Inc.
>
>

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