Recommendation to revoke public permissions in Database

Hello,
The security area of the company is implementing a tool that generates reports of vulnerabilities in our infrastructure, today they sent us the vulnerabilities and informed us that we had to revoke the following permissions:

REVOKE EXECUTE ON DBMS_CREDENTIAL FROM PUBLIC;
REVOKE EXECUTE ON DBMS_SQL FROM PUBLIC;
REVOKE EXECUTE ON DBMS_XMLGEN FROM PUBLIC;
REVOKE EXECUTE ON DBMS_XMLQUERY FROM PUBLIC;
REVOKE EXECUTE ON DBMS_XMLSAVE FROM PUBLIC;
REVOKE EXECUTE ON DBMS_XMLSTORE FROM PUBLIC;
REVOKE EXECUTE ON DBMS_AW FROM PUBLIC;
REVOKE EXECUTE ON OWA_UTIL FROM PUBLIC;
REVOKE EXECUTE ON DBMS_REDACT FROM PUBLIC;
REVOKE EXECUTE ON DBMS_JOB FROM PUBLIC;