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VID 25167
Severity 40
Port 1521, ...
Protocol TCP
Class DB
Detailed Description The ORACLE server on the host system sets REMOTE_OS_ROLES to TRUE.
If REMOTE_OS_ROLES is set to TRUE, remote clients can access database by pretending to be the OS's other user.

* Platforms Affected:
UNIX any version
Linux any version
Microsoft Windows any version
Recommendation Open $Oracle_Home/dbs/SPFILE<SID>.ORA or $Oracle_Home/admin/pfile/init<sid>.ora and add the following.
REMOTE_OS_ROLES=FALSE
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Related URL (ISS)