The Juniper EX switch must be configured to use FIPS 140-2 approved algorithms for authentication to a cryptographic module.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-253911	JUEX-NM-000340	SV-253911r961050_rule		High

Description
Unapproved mechanisms that are used for authentication to the cryptographic module are not validated and therefore cannot be relied upon to provide confidentiality or integrity, and DOD data may be compromised. Network devices utilizing encryption are required to use FIPS-compliant mechanisms for authenticating to cryptographic modules. FIPS 140-2 is the current standard for validating that mechanisms used to access cryptographic modules utilize authentication that meets DOD requirements. However, authentication algorithms must configure security processes to use only FIPS-approved and NIST-recommended authentication algorithms. Use only AES Counter (CTR) cipher block chaining modes in compliance with CVE-2008-5161, plugin 70658 based on vendor guidance in KB20853. This prevents certain plaintext attacks in OpenSSH.

Description

Unapproved mechanisms that are used for authentication to the cryptographic module are not validated and therefore cannot be relied upon to provide confidentiality or integrity, and DOD data may be compromised. Network devices utilizing encryption are required to use FIPS-compliant mechanisms for authenticating to cryptographic modules. FIPS 140-2 is the current standard for validating that mechanisms used to access cryptographic modules utilize authentication that meets DOD requirements. However, authentication algorithms must configure security processes to use only FIPS-approved and NIST-recommended authentication algorithms. Use only AES Counter (CTR) cipher block chaining modes in compliance with CVE-2008-5161, plugin 70658 based on vendor guidance in KB20853. This prevents certain plaintext attacks in OpenSSH.

STIG	Date
Juniper EX Series Switches Network Device Management Security Technical Implementation Guide	2024-06-20

Details

Check Text ( C-57363r944346_chk )
Determine if the network device uses FIPS 140-2 approved algorithms for authentication to a cryptographic module. Verify the password format and SSH use approved algorithms. Verify the random number generator (RNG) is hmac-drbg, a FIPS approved RNG. [edit system] login { password { : format ; } } services { ssh { : ciphers [ aes256-ctr aes192-ctr aes128-ctr ]; macs [ hmac-sha2-512 hmac-sha2-256 ]; key-exchange [ ecdh-sha2-nistp521 ecdh-sha2-nistp384 ecdh-sha2-nistp256 dh-group14-sha1 ]; : } } rng { hmac-drbg; } If the network device is not configured to use a FIPS-approved authentication algorithm to a cryptographic module, this is a finding.

Check Text ( C-57363r944346_chk )

Determine if the network device uses FIPS 140-2 approved algorithms for authentication to a cryptographic module.

Verify the password format and SSH use approved algorithms. Verify the random number generator (RNG) is hmac-drbg, a FIPS approved RNG.

[edit system]
login {
password {
:
format ;
}
}
services {
ssh {
:
ciphers [ aes256-ctr aes192-ctr aes128-ctr ];
macs [ hmac-sha2-512 hmac-sha2-256 ];
key-exchange [ ecdh-sha2-nistp521 ecdh-sha2-nistp384 ecdh-sha2-nistp256 dh-group14-sha1 ];
:
}
}
rng {
hmac-drbg;
}

If the network device is not configured to use a FIPS-approved authentication algorithm to a cryptographic module, this is a finding.

Fix Text (F-57314r944347_fix)
Configure the network device to use FIPS 140-2 approved algorithms for authentication to a cryptographic module. set system login password format set system services ssh ciphers aes256-ctr set system services ssh ciphers aes192-ctr set system services ssh ciphers aes128-ctr set system services ssh macs hmac-sha2-512 set system services ssh macs hmac-sha2-256 set system services ssh key-exchange ecdh-sha2-nistp521 set system services ssh key-exchange ecdh-sha2-nistp384 set system services ssh key-exchange ecdh-sha2-nistp256 set system services ssh key-exchange dh-group14-sha1 set system rng hmac-drbg

Fix Text (F-57314r944347_fix)

Configure the network device to use FIPS 140-2 approved algorithms for authentication to a cryptographic module.

set system login password format
set system services ssh ciphers aes256-ctr
set system services ssh ciphers aes192-ctr
set system services ssh ciphers aes128-ctr
set system services ssh macs hmac-sha2-512
set system services ssh macs hmac-sha2-256
set system services ssh key-exchange ecdh-sha2-nistp521
set system services ssh key-exchange ecdh-sha2-nistp384
set system services ssh key-exchange ecdh-sha2-nistp256
set system services ssh key-exchange dh-group14-sha1
set system rng hmac-drbg