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The Cisco switch must be configured to authenticate Network Time Protocol (NTP) sources using authentication with FIPS-compliant algorithms.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-220606CISC-ND-001150SV-220606r1156814_ruleCCI-001967medium
Description
If NTP 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.
STIGDate
Cisco IOS Switch NDM Security Technical Implementation Guide2026-06-05

Related Frameworks

1 mapping across 4 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

IAC-04Identification & Authentication for Devices
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (49) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-17(10)Authenticate Remote Commands
1.00
AC-17(2)Protection of Confidentiality and Integrity Using Encryption
1.00
AC-18(1)Authentication and Encryption
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(11)Usage Conditions
1.00
AC-2(2)Automated Temporary and Emergency Account Management
1.00
AC-2(3)Disable Accounts
1.00
AC-4(17)Domain Authentication
1.00
AC-7Unsuccessful Logon Attempts
1.00
AU-8Time Stamps
1.00

+39 more (top 10 by confidence shown)

CCI1 mapping
CCI-001967
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 4 hops (3) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

PR.AA-01
0.50
PR.AA-03
0.50
PR.AA-05
0.50

Details

Check Text (C-220606r1156814_chk)

Review the Cisco switch configuration to verify it authenticates NTP sources using authentication with FIPS-compliant algorithms as shown in the configuration example below: ntp authentication-key 1 md5 xxxxxx ntp authenticate ntp trusted-key 1 ntp server x.x.x.x key 1 ntp server y.y.y.y key 1 Note: Cisco IOS is limited to MD5 for NTP authentication, and incurs a permanent finding as it is not FIPS compliant. MD5 partially reduces the risk but cannot fully mitigate it. If the Cisco switch is not configured to authenticate NTP sources using authentication with FIPS-compliant algorithms, this is a finding.

Fix Text (F-22310r1156813_fix)

Configure the Cisco switch to authenticate NTP sources using authentication with FIPS-compliant algorithms as shown in the example below: SW2(config)#ntp authenticate SW2(config)#ntp authentication-key 1 md5 xxxxxx SW2(config)#ntp trusted-key 1 SW2(config)#ntp server x.x.x.x key 1 SW2(config)#ntp server y.y.y.y key 1