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All shell files must have mode 0755 or less permissive.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-922 | GEN002220 | SV-37403r1_rule | ECLP-1 | High |
| Description |
|---|
| Shells with world/group write permissions give the ability to maliciously modify the shell to obtain unauthorized access. |
| STIG | Date |
|---|---|
| Red Hat Enterprise Linux 5 Security Technical Implementation Guide | 2013-07-03 |
Details
| Check Text ( C-36087r1_chk ) |
|---|
| 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. |
| Fix Text (F-31334r1_fix) |
|---|
| Change the mode of the shell. # chmod 0755 |