Infoblox systems that communicate with non-Grid name servers must use a unique Transaction Signature (TSIG).
An XCCDF Rule
Description
<VulnDiscussion>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 also can 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 resource record (RR) and used to authenticate an entire DNS message. The process of authenticating the source of a message and its integrity through hash-based message authentication codes (HMAC) is specified through a set of DNS specifications known collectively as TSIG. The sender of the message uses the HMAC function to generate a MAC and sends this MAC along with the message to the receiver. The receiver, who shares the same secret key, uses the key and HMAC function used by the sender to compute the MAC on the received message. The receiver then compares the computed MAC with the received MAC; if the two values match, it provides assurance that the message has been received correctly and that the sender belongs to the community of users sharing the same secret key. Thus, message source authentication and integrity verification are performed in a single process.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-233902r621666_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
1. Navigate to Data Management >> DNS >> Zones tab.
2. Select a zone identified in the Check and click "Edit".
3. Click on the "Name Servers" tab and configure a unique TSIG key for each non-Grid Name Server, designated as type Ext.
4. Verify that the same TSIG key (Algorithm and Key Data) are configured on both name servers.
5. Click on the "Zone Transfers" tab.
6. If the Name Server configured above is not present, click "Override" for the "Allow Zone Transfers to" section. Use the radio button to select "Set of ACEs" and the "Add" drop-down to configure the Name Server configured above.