Check: SRG-APP-000401-DNS-000051
Domain Name System (DNS) SRG:
SRG-APP-000401-DNS-000051
(in versions v4 r1 through v2 r4)
Title
The DNS server implementation, for PKI-based 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. (Cat II impact)
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). SIG(0) is used for server-to-server authentication for DNS transactions, and it uses PKI-based authentication. So, in cases where SIG(0) is being used instead of TSIG (which uses a shared key, not PKI-based authentication), this requirement is applicable.
Check Content
Review the DNS server implementation configuration to determine if the DNS server, for PKI-based authentication (i.e., SIG(0)), implements a local cache of revocation data to support path discovery and validation in case of the inability to access revocation information via the network. If the DNS server does not implement such a cache of revocation data, this is a finding.
Fix Text
Configure the DNS server, for PKI-based authentication, to 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.
Additional Identifiers
Rule ID: SV-205205r982028_rule
Vulnerability ID: V-205205
Group Title: SRG-APP-000401
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-001991 |
The information system, for PKI-based authentication, implements a local cache of revocation data to support path discovery and validation in case of inability to access revocation information via the network. |
CCI-004068 |
For public key-based authentication, implement a local cache of revocation data to support path discovery and validation. |
Controls
Number | Title |
---|---|
IA-5(2) |
Pki-based Authentication |