Detections
Analytics
Recursive DNS Server Detection
medium Nessus Network Monitor Plugin ID 3703
Synopsis
The remote name server allows recursive queries to be performed.Description
It is possible to query the remote nameserver for third party names. If this is your internal nameserver, then disregard this warning. If the host allows these recursive queries via UDP, then the host can be used to 'bounce' Denial of Service attacks against another network or system.Solution
Restrict recursive queries to the hosts that should use this nameserver (such as those of the LAN connected to it). If you are using BIND 8, you can do this by using the instruction 'allow-recursion' in the 'options' section of your named.conf. If you are using BIND 9, you can define a grouping of internal addresses using the 'acl' command. Then, within the options block, you can explicitly state: 'allow-recursion { hosts_defined_in_acl }'. If you are using another name server, consult its documentation.See Also
http://technet.microsoft.com/en-us/library/cc787602%28WS.10%29.aspx
Plugin Details
Severity: Medium
ID: 3703
Family: DNS Servers
Published: 8/9/2006
Updated: 3/6/2019
Nessus ID: 10539
Risk Information
VPR
Risk Factor: Low
Score: 3.4
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 4.3
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 4.9
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C
Reference Information
CVE: CVE-1999-0024