The DataPower Gateway providing user authentication intermediary services using PKI-based user authentication must implement a local cache of revocation data to support path discovery and validation in case of the inability to access revocation information via the network.

From IBM DataPower ALG Security Technical Implementation Guide

Associated with: CCI-001991

SV-79755r1_rule The DataPower Gateway providing user authentication intermediary services using PKI-based user authentication must implement a local cache of revocation data to support path discovery and validation in case of the inability to access revocation information via the network.

Vulnerability discussion

Without configuring a local cache of revocation data, there is the potential to allow access to users who are no longer authorized (users with revoked certificates).The intent of this requirement is to require support for a secondary certificate validation method using a locally cached revocation data, such as Certificate Revocation List (CRL), in case access to OCSP (required by CCI-000185) is not available. Based on a risk assessment, an alternate mitigation is to configure the system to deny access when revocation data is unavailable. This requirement applies to ALGs that provide user authentication intermediary services (e.g., authentication gateway or TLS gateway). This does not apply to authentication for the purpose of configuring the device itself (device management).

Check content

Search Bar “AAA Policy” >> Select AAA Policy. If no AAA Policy is present, this is a finding. Search Bar “AAA Policy” >> Select AAA Policy >> AAA policy >> Authentication. If cache authentication results “Disabled”, this is a finding. Search Bar “Processing Policy” >> processing policy >> Policy Maps tab processing rule >> Rule Action. If no AAA action exists, this is a finding.

Fix text

Search Bar “AAA Policy” >> Select AAA Policy >> AAA policy >> Authentication >> Cache authentication results “Absolute” or “Maximum” or “Minimum” >> Cache Lifetime cache value. Search Bar “Processing Policy” >> processing policy >> Policy Maps tab processing rule >> Processing Rule processing rule >> Rule Action AAA policy

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