In OceanBase's Oracle tenant mode, a malicious user with specific privileges can achieve privilege escalation to SYS-level access by executing carefully crafted commands. This vulnerability only a

Successful exploitation of CVE-2025-8107 allows an attacker to bypass access controls and assume the role of the SYS administrator within the OceanBase Oracle tenant. This grants complete control over the database, including the ability to read, modify, and delete data, create and drop users, and alter system configurations. The blast radius is significant, as a compromised SYS account effectively compromises the entire database instance. This vulnerability is particularly concerning in multi-tenant environments where a compromised tenant could be used as a stepping stone to attack other tenants or the underlying infrastructure. The ability to escalate privileges to SYS level represents a critical security risk.

Organizations utilizing OceanBase Server in Oracle tenant mode, particularly those with complex multi-tenant deployments or legacy configurations where privilege separation may be inadequate, are at increased risk. Shared hosting environments where multiple tenants share the same OceanBase instance should also be considered high-priority targets.

• oracle / server:

SELECT user FROM dual WHERE username = 'SYS';

• oracle / server:

SELECT privilege FROM dba_tab_privs WHERE grantee = 'YOUR_TENANT_USER';

• generic web: Monitor OceanBase server logs for unusual command execution patterns or attempts to access SYS-level resources. • generic web: Review user privilege assignments within the Oracle tenant to identify any accounts with excessive permissions.

1. 2025-07-24Disclosure

   disclosure

1. Reservado2025-07-24
2. Publicada2025-07-24
3. Modificada2025-07-31
4. EPSS atualizado2026-03-23

The primary mitigation for CVE-2025-8107 is to upgrade OceanBase Server to version 4.3.5 or later, which includes the necessary fix. If immediate upgrading is not feasible, consider implementing strict access controls and privilege separation within the Oracle tenant mode to limit the potential impact of a successful attack. Regularly review user privileges and audit logs for suspicious activity. While a direct WAF rule is unlikely to be effective, monitoring for unusual command execution patterns within the database could provide early warning signs. After upgrading, confirm the fix by attempting to execute the vulnerable commands and verifying that privilege escalation is prevented.