Network client connections must be restricted to supported versions.

From Oracle Database 12c Security Technical Implementation Guide

Associated with: CCI-000366

SV-76025r2_rule Network client connections must be restricted to supported versions.

Vulnerability discussion

Unsupported Oracle network client installations may introduce vulnerabilities to the database. Restriction to use of supported versions helps to protect the database and helps to enforce newer, more robust security controls.

Check content

Note: The SQLNET.ALLOWED_LOGON_VERSION parameter is deprecated in Oracle Database 12c. This parameter has been replaced with two new Oracle Net Services parameters: SQLNET.ALLOWED_LOGON_VERSION_SERVER SQLNET.ALLOWED_LOGON_VERSION_CLIENT View the SQLNET.ORA file in the ORACLE_HOME/network/admin directory or the directory specified in the TNS_ADMIN environment variable. (Please see the supplemental file "Non-default sqlnet.ora configurations.pdf" for how to find multiple and/or differently located sqlnet.ora files.) Locate the following entries: SQLNET.ALLOWED_LOGON_VERSION_SERVER = 11 SQLNET.ALLOWED_LOGON_VERSION_CLIENT=11 If the parameters do not exist, this is a finding. If the parameters are not set to a value of 11 or higher, this is a finding. Note: Attempting to connect with a client version lower than specified in these parameters may result in a misleading error: ORA-01017: invalid username/password: logon denied

Fix text

Edit the SQLNET.ORA file to add or edit the entries: SQLNET.ALLOWED_LOGON_VERSION_SERVER = 11 SQLNET.ALLOWED_LOGON_VERSION_CLIENT=11 Set the value to 11 or higher. Valid values for SQLNET.ALLOWED_LOGON_VERSION_SERVER are: 8,9,10,11,12 and 12a Valid values for SQLNET.ALLOWED_LOGON_VERSION_CLIENT are: 8,10,11,12 and 12a For more information on sqlnet.ora parameters refer to the following document: "Database Net Services Reference" http://docs.oracle.com/database/121/NETRF/sqlnet.htm#NETRF006

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