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Onapsis Security Advisory ONAPSIS-2015-004: SAP Business Objects Unauthorized Audit Information Delete via CORBA
By exploiting this vulnerability a remote unauthenticated attacker would be able to delete auditing information of the remote system.
This way, the attacker could perform malicious activities without being detected.
Risk Level: High
Business Objects is part of the Business Intelligence platform from SAP. It has components that provide performance management, planning, reporting, query and analysis and enterprise information management.
Every Business Objects installation provides a web service to interact with different platform services.
It is possible for an unauthenticated user to remove audit events from a remote BusinessObjects service using CORBA. Specifically, the attacker can tell the remote service (i.e. the auditee) to clear an event from it's queue. After the event is removed from the auditee queue, the auditor will never have knowledge of the event and, hence, it will not be written to the Audit database. An attacker can use this to hide their actions. By default, the auditor polls all auditees every 5 minutes to ask for events in their queue.
Note, this vulnerability does not allow an attacker to remove events already written to the database. It only allows events waiting in the auditee queue to be removed. The clearData CORBA operation is used to remove the event; authentication is not required.
SAP has released SAP Note 2011396 which provides patched versions of the affected components.
The patches can be downloaded from https://service.sap.com/sap/support/notes/2011396
Onapsis strongly recommends SAP customers to download the related security fixes and apply them to the affected components in order to reduce business risks.
2014-01-16: Onapsis provides vulnerability information to SAP AG. 2014-02-17: SAP confirms having the information of vulnerability. 2014-10-14: SAP releases security patches. 2015-02-25: Onapsis releases security advisory.
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