CVE-2021-2173
CVE-2021-2173
PoC is explained here: https://databasesecurityninja.wordpress.com/2021/06/04/cve-2021-2173-pdb-isolation-is-broken-through-metadata-exposure/
Oracle Critical Patch Update Advisory - April 2021: https://www.oracle.com/security-alerts/cpuapr2021.html