Check: CISC-ND-001150
Cisco NX OS Switch NDM STIG:
CISC-ND-001150
(in versions v2 r8 through v1 r0.1)
Title
The Cisco switch must be configured to authenticate Network Time Protocol (NTP) sources using authentication that is cryptographically based. (Cat II impact)
Discussion
If Network Time Protocol is not authenticated, an attacker can introduce a rogue NTP server. This rogue server can then be used to send incorrect time information to network devices, which will make log timestamps inaccurate and affect scheduled actions. NTP authentication is used to prevent this tampering by authenticating the time source.
Check Content
Review the Cisco switch configuration to verify that it is compliant with this requirement as shown in the configuration example below: ntp distribute ntp server 10.1.12.10 key 1 ntp server 10.1.22.13 key 1 ntp authenticate ntp authentication-key 1 md5 xxxxxxxxxx 7 ntp trusted-key 1 ntp commit If the Cisco switch is not configured to authenticate NTP sources using authentication that is cryptographically based, this is a finding.
Fix Text
Configure the Cisco switch to authenticate NTP sources using authentication that is cryptographically based as shown in the example below: SW1(config)# ntp authenticate SW1(config)# ntp authentication-key 1 md5 xxxxxxxxxxxxx SW1(config)# ntp trusted-key 1 SW1(config)# ntp server 10.1.12.10 key 1 SW1(config)# ntp server 10.1.22.13 key 1 SW1(config)# ntp commit SW1(config)# end
Additional Identifiers
Rule ID: SV-220502r879768_rule
Vulnerability ID: V-220502
Group Title: SRG-APP-000395-NDM-000347
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-001967 |
The information system authenticates organization-defined devices and/or types of devices before establishing a local, remote, and/or network connection using bidirectional authentication that is cryptographically based. |
Controls
Number | Title |
---|---|
IA-3 (1) |
Cryptographic Bidirectional Authentication |