Read/Write access to the key file must be restricted to the account that runs the name server software only.

From Domain Name System (DNS) Security Requirements Guide

Associated with: CCI-000186

SV-69051r1_rule Read/Write access to the key file must be restricted to the account that runs the name server software only.

Vulnerability 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 privileges on the key file and the account under which the name server software is run. If the account under which the name server software is run is not the only account which has read/modify permissions to the key file, this is a finding.

Fix text

Apply permissions to the key file to provide read/modify permissions only to the account under which the name server software is run.

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.