Check: SRG-APP-000176-DNS-000018
Domain Name System (DNS) SRG:
SRG-APP-000176-DNS-000018
(in versions v3 r2 through v2 r4)
Title
The key file must be owned by the account under which the name server software is run. (Cat II impact)
Discussion
To enable zone transfer (requests and responses) through authenticated messages, it is necessary to generate a key for every pair of name servers. The key can also be used for securing other transactions, such as dynamic updates, DNS queries, and responses. The binary key string that is generated by most key generation utilities used with DNSSEC is Base64-encoded. TSIG is a string used to generate the message authentication hash stored in a TSIG RR and used to authenticate an entire DNS message.
Check Content
Review the DNS system to determine ownership of the key file and the account under which the name server software is run. If the key file owner is not the same account as the account under which the name server is run, this is a finding.
Fix Text
Change ownership for the key file to the account under which the name server software is run.
Additional Identifiers
Rule ID: SV-205171r879613_rule
Vulnerability ID: V-205171
Group Title: SRG-APP-000176
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000186 |
The information system, for PKI-based authentication, enforces authorized access to the corresponding private key. |
Controls
Number | Title |
---|---|
IA-5 (2) |
Pki-Based Authentication |