Oracle E-Business suite RRA/FNDFS server has been reported prone to an arbitrary file disclosure vulnerability. The Oracle FNDFS server is used in usual circumstances, by Oracle utilities, to retrieve and extract report data from Concurrent Manager server. It has been reported that FNDFS may be used by an attacker to reveal the contents of arbitrary files located on the Concurrent Manager server that are readable by 'oracle' or 'applmgr' user accounts. Sensitive information obtained in this manner may be used in further attacks launched against the vulnerable system.
Block external access at the network boundary, unless external parties require service.
If applicable block or restrict, access to the Concurrent Manager server and SQLNet traffic, at the network boundary. Block ports used by SQLNet. Allow SQL*Net traffic from trusted hosts and networks only.
Run all software as a nonprivileged user with minimal access rights.
Running the server with least possible privileges in a restricted environment may mitigate the impact of successful exploitation of this vulnerability.
Implement multiple authentication mechanisms.
If applicable employ FNDFS TNS Listener password and connection restrictions. This action may help prevent attempts to exploit this vulnerability.
The vendor has released patches that address this issue. Users have been advised to upgrade with the relevant patch. Users of Applications Desktop Integrator (ADI) are required to install an additional patch #2778660. See attached security alert (Oracle Security Alert #53) for further upgrade details.