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All shell files must not have extended ACLs.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-22366 | GEN002230 | SV-26013r1_rule | ECLP-1 | Medium |
| Description |
|---|
| Shells with world/group-write permissions give the ability to maliciously modify the shell to obtain unauthorized access. |
| STIG | Date |
|---|---|
| UNIX SRG | 2013-03-26 |
Details
| Check Text ( C-27549r1_chk ) |
|---|
| If /etc/shells exists, check the permissions of each shell referenced. # cat /etc/shells | xargs -n1 ls -lL Otherwise, check any shells found on the system. # find / -name "*sh" | xargs -n1 ls -lL If the permissions include a "+", the file has an extended ACL, this is a finding. |
| Fix Text (F-26219r1_fix) |
|---|
| Remove the extended ACL from the shell file(s). |