TMA-TDSQL-3.8
Ensure Correct Permissions on MySQL Tablespace Files
HighLevel 1Automatedtdsql
Description
MySQL InnoDB tablespace files (.ibd), the system tablespace (ibdata*), redo log files (ib_logfile*), and undo tablespace files should have restrictive permissions. Uses TDSQL_DATA (default /data/tdsql/data) for the instance data directory. Counts *.ibd, ibdata* and ib_logfile* files readable by other users; expected 0640, owner mysql:mysql.
How it is checked
Audit method: Shell command
shell
n=0; for p in "${TDSQL_DATA:-/data/tdsql/data}"; do [ -e "$p" ] && n=$((n+1)); done; [ $n -gt 0 ] || exit 1; c=0; for p in "${TDSQL_DATA:-/data/tdsql/data}"; do [ -e "$p" ] || continue; c=$((c + $(find "$p" -type f \( -name '*.ibd' -o -name 'ibdata*' -o -name 'ib_logfile*' \) -perm /o+r -print 2>/dev/null | wc -l))); done; echo $c- Expected output
0
How it is fixed
Fix method: Guidance or infrastructure patch
find <data dir> \( -name '*.ibd' -o -name 'ibdata*' -o -name 'ib_logfile*' \) -exec chmod 640 {} + and chown mysql:mysql them.
Properties
- Operating systems
- Any
- Tags
- tdsqlpermissions
- Reference
- CIS Tencent TDSQL 10.3.22 Benchmark v1.0.0 - 3.8 Ensure Correct Permissions on MySQL Tablespace Files
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
shell
tmaegis scan --target tdsql