How many world writeable files on your system? (Mandriva Linux msec)

# wc -l /var/log/security/writable.today
Mandriva Linux includes a security tool called "msec" (configurable via "draksec"). One of the many things it regularily checks for is world writeable files. If any are found, it writes the list to /var/log/security/writable.today. "wc -l" simply counts the number of lines in the file. This number should be low. Browse through /var/log/security/writable.today and consider if any of those files *need* to be world-writeable (and if not, modify the permissions. eg: "chmod o-w $file"). A large number of world-writeable files may indicate that umask is not correctly set in /etc/profile (or ${HOME}/.bash_profile) but could also indicate poor security configuration or even malicious activity.
Sample Output
# wc -l /var/log/security/writable.today
7 /var/log/security/writable.today

0
By: mpb
2009-03-19 12:25:52
wc

What Others Think

Similarly: find / -xdev -type f -perm -o=w -xdev prevents descending into other filesystems (your call). -type f prevents listing symlinks, which are nominally, but not really, world-writable.
citybadger · 544 weeks and 1 day ago
"msec" is run from crontab so the /var/log/security/writable.today file is there "already". You don't have to wait for a find to work its way all through the entire filesystem.
mpb · 544 weeks and 1 day ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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