Microsoft SQL Server
TMA-MSSQL2022-3.11
Ensure the public role in the msdb database is not granted access to SQL Agent proxies
Description
The public database role contains every user in the msdb database. SQL Agent proxies define a security context in which a job step can run. Granting access to SQL Agent proxies for the public role would allow all users to utilize the proxy which may have high privileges. This would likely break the principle of least privileges.
How it is checked
Audit method: SQL query
sqlcmd -b -h -1 -W -Q "SET NOCOUNT ON; SELECT COUNT(*) FROM msdb.dbo.sysproxylogin spl JOIN msdb.sys.database_principals dp ON dp.sid = spl.sid JOIN msdb.dbo.sysproxies sp ON sp.proxy_id = spl.proxy_id WHERE dp.name = 'public';"- Expected output
0
How it is fixed
Fix method: Guidance or infrastructure patch
1. Ensure the required security principals are explicitly granted access to the proxy (use sp_grant_login_to_proxy). 2. Revoke access to the <proxyname> from the public role. USE [msdb] GO EXEC dbo.sp_revoke_login_from_proxy @name = N'public', @proxy_name = N'<proxyname>'; GO
Properties
- Operating systems
- Any
- Tags
- access-controliammssqlsqlserver-2022
- Reference
- CIS Microsoft SQL Server 2022 Benchmark v1.3.0 - 3.11 Ensure the public role in the msdb database is not granted access to SQL Agent proxies
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
tmaegis scan --target mssql