BIND 9.x Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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The secondary name servers in a BIND 9.x implementation must be configured to initiate zone update notifications to other authoritative zone name servers.
<VulnDiscussion>It is important to maintain the integrity of a zone file. The serial number of the SOA record is used to indicate to secondar...Rule Low Severity -
SRG-APP-000516-DNS-000110
<GroupDescription></GroupDescription>Group -
On the BIND 9.x server the platform on which the name server software is hosted must be configured to send outgoing DNS messages from a random port.
<VulnDiscussion>Hosts that run the name server software should not provide any other services and therefore should be configured to respond t...Rule Low Severity -
SRG-APP-000447-DNS-000068
<GroupDescription></GroupDescription>Group -
A BIND 9.x caching name server must implement DNSSEC validation to check all DNS queries for invalid input.
<VulnDiscussion>A common vulnerability of applications is unpredictable behavior when invalid inputs are received. This requirement guards ag...Rule Medium Severity -
SRG-APP-000001-DNS-000001
<GroupDescription></GroupDescription>Group -
A BIND 9.x master name server must limit the number of concurrent zone transfers between authorized secondary name servers.
<VulnDiscussion>Limiting the number of concurrent sessions reduces the risk of Denial of Service (DoS) to the DNS implementation. Name serve...Rule Medium Severity -
SRG-APP-000246-DNS-000035
<GroupDescription></GroupDescription>Group -
A BIND 9.x implementation configured as a caching name server must restrict recursive queries to only the IP addresses and IP address ranges of known supported clients.
<VulnDiscussion>Any host that can query a resolving name server has the potential to poison the servers name cache or take advantage of other...Rule Medium Severity -
SRG-APP-000158-DNS-000015
<GroupDescription></GroupDescription>Group
Node 2
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