The IBM z/VM TCP/IP SECURETELNETCLIENT option for telnet must be set to YES.

From IBM z/VM Using CA VM:Secure Security Technical Implementation Guide

Associated with: CCI-002422

SV-93649r1_rule The IBM z/VM TCP/IP SECURETELNETCLIENT option for telnet must be set to YES.

Vulnerability discussion

Information can be either unintentionally or maliciously disclosed or modified during preparation for transmission, for example, during aggregation, at protocol transformation points, and during packing/unpacking. These unauthorized disclosures or modifications compromise the confidentiality or integrity of the information.Ensuring the confidentiality of transmitted information requires the operating system to take measures in preparing information for transmission. This can be accomplished via access control and encryption.Use of this requirement will be limited to situations where the data owner has a strict requirement for ensuring data integrity and confidentiality is maintained at every step of the data transfer and handling process. When transmitting data, operating systems need to support transmission protection mechanisms such as TLS, SSL VPNs, or IPsec.The SECUREDATA statement specifies the FTP server-wide minimum security level for data connections.

Check content

Examine the TCP/IP DATA file. If “SECURETELNETCLIENT” option is set to “YES”, this is not a finding.

Fix text

Configure the TCP/IP DATA file “SECURETELNETCLIENT” option to “YES”.

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