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Device files and directories must only be writable by users with a system account or as configured by the vendor.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-924 | GEN002280 | SV-924r3_rule | Medium |
| Description |
|---|
| System device files in writable directories could be modified, removed, or used by an unprivileged user to control system hardware. |
| STIG | Date |
|---|---|
| Solaris 10 SPARC Security Technical Implementation Guide | 2020-02-26 |
Details
| Check Text ( C-465r3_chk ) |
|---|
| Find all device files existing anywhere on the system. Procedure: # find / -type b -print > devicelist # find / -type c -print >> devicelist Check the permissions on the directories above subdirectories containing device files. The following list of device files are intended to be world-writable and if present are not a finding. /dev/arp /dev/conslog /dev/crypto /dev/dtrace/dtrace /dev/dtrace/helper /dev/dtrace/provider/fasttrap /dev/fd/* /dev/kstat /dev/null /dev/poll /dev/pool /dev/ptmx /dev/sad/user /dev/tcp /dev/tcp6 /dev/ticlts /dev/ticots /dev/ticotsord /dev/tty /dev/udp /dev/udp6 /dev/zero /dev/zfs If any device file or their parent directory is world-writable and it is not intended to be world-writable, this is a finding. |
| Fix Text (F-1078r3_fix) |
|---|
| Remove the world-writable permission from the device file(s). Procedure: # chmod o-w Document all changes. |