Title

The IBM z/VM TCP/IP VMSSL command operands must be configured properly. (Cat I impact)

Discussion

VMSSL services are initiated using the VMSSL command defined in the DTCPARMS file. Unapproved mechanisms that are used for authentication to the cryptographic module are not verified and therefore cannot be relied upon to provide confidentiality or integrity, and DoD data may be compromised.

Check Content

Examine the “DTCPARMS” File for each SSL server pool. If the “VMSSL” command is configured as follows, this is not a finding. FIPS (Operand FIPS is equivalent to setting MODE FIPS-140-2.) MODE FIPS-140-2 (Operand MODE FIPS-140-2 is equivalent to setting operand FIPS.) MODE NIST-800-131a PROTOcol TLSV_2 SSLV2 The EXEMPT cipher_suite operand is set to a FIPS 140-2 compliant value. The EXEMPT strength_set operand is set to “MEDIUM”.

Fix Text

Configure the “VMSSL” command to MODE FIPS-140-2, either by including the FIPS operand or by setting the MODE operand to FIPS-140-2. Include MODE operand for NIST-800-131a. Include the PROTOcol operands for TLSV_2 and SSLV2. The “EXEMPT cipher_suite” operand is set to a FIPS 140-2 compliant. The EXEMPT strength_set is set to “MEDIUM”.

Additional Identifiers

Rule ID:

Vulnerability ID: IBMZ-VM-000660

Group Title:

Expert Comments

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