Re: Additional parameter in PROCTITLE.proctitle when executing rm
Side note:
I found on some previous versions of CentOS 7 that if you audit a system call that often
comes before the exec() system call (e.g., auditing close() which is called a number of
times after a fork but before an exec), the PROCTITLE field will be for the parent process
and not the new process.
I am guessing that PROCTITLE is set at the first audit record (e.g., close() ) and isn’t
reset later such as when the exec() is called.
(I haven’t tested this on recent versions of CentOS or RHEL)
Todd
On Mar 18, 2021, at 1:13 PM, Richard Guy Briggs
<rgb(a)redhat.com> wrote:
On 2021-03-18 16:31, Alan Evangelista 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?
At first, this looks like something left over from the "-i" parameter
supplied to ausearch to interpret the values in the audit records to
give you that plaintext.
But more likely, it is an alias in ~/.bashrc, ~/.bash-profile,
~/.profile, /etc/bashrc, /etc/bash.bashrc, /etc/profile,
/etc/profile.d/* that is nannying you to be sure you meant to delete
what you are asking to delete.
This can be overridden with -f. rm(1) options preceed the filespec.
> Alan
- RGB
--
Richard Guy Briggs <rgb(a)redhat.com>
Sr. S/W Engineer, Kernel Security, Base Operating Systems
Remote, Ottawa, Red Hat Canada
IRC: rgb, SunRaycer
Voice: +1.647.777.2635, Internal: (81) 32635
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