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Full Discussion: Stop root from writing to directory
Top Forums UNIX for Advanced & Expert Users Stop root from writing to directory Post 303041550 by cokedude on Wednesday 27th of November 2019 06:08:21 PM
Old 11-27-2019
Quote:
Originally Posted by Neo
Note to Original Poster:

You do realize, of course, that when root runs chattr to prohibit writing to a directory, root can also run chattr to permit the same.

So, this method does not stop malicious activity from a user with root privs because root can recursively reverse this using the same chattr command.

You could restrict using chattr and then remove chattr from the system, but that is also not a 'perfect' solution.

The more important question to the original poster is "what are you actually trying to accomplish, why are you doing this and what is the risk profile of the system in question?".

See this post and others like it: Alternative for chattr
I have a VERY annoying and poorly written app that has to be run as root and I am not allowed to get rid of, that will not stop writing to a directory and filling up the file system. When this filesystem fills up it prevents people from logging in through ssh then I have login to the console to fix this. This is also an old server that I can can extent the file system because it does not have lvm.
 

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LEARN ABOUT MOJAVE

lsattr

LSATTR(1)						      General Commands Manual							 LSATTR(1)

NAME

       lsattr - list file attributes on a Linux second extended file system

SYNOPSIS

       lsattr [ -RVadlpv ] [ files...  ]

DESCRIPTION

       lsattr lists the file attributes on a second extended file system.  See chattr(1) for a description of the attributes and what they mean.

OPTIONS

       -R     Recursively list attributes of directories and their contents.

       -V     Display the program version.

       -a     List all files in directories, including files that start with `.'.

       -d     List directories like other files, rather than listing their contents.

       -l     Print the options using long names instead of single character abbreviations.

       -p     List the file's project number.

       -v     List the file's version/generation number.

AUTHOR

       lsattr was written by Remy Card <Remy.Card@linux.org>.  It is currently being maintained by Theodore Ts'o <tytso@alum.mit.edu>.

BUGS

       There are none :-).

AVAILABILITY

       lsattr is part of the e2fsprogs package and is available from http://e2fsprogs.sourceforge.net.

SEE ALSO

       chattr(1)

E2fsprogs version 1.44.1					    March 2018								 LSATTR(1)
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