V-922

Discussion

Shells with world/group write permissions give the ability to maliciously modify the shell to obtain unauthorized access.

Check Content

If /etc/shells exists, check the group ownership of each shell referenced.
# cat /etc/shells | xargs -n1 ls -l

Otherwise, check any shells found on the system.
# find / -name "*sh" | xargs -n1 ls -l

If a shell has a mode more permissive than 0755, this is a finding.