title: NFX250 Series: Hardcoded credentials in the vSRX VNF instance.
description: A Use of Hard-coded Credentials vulnerability exists in the NFX250 Series for the vSRX Virtual Network Function (VNF) instance, which allows an attacker to take control of the vSRX VNF instance if they have the ability to access an administrative service (e.g. SSH) on the VNF, either locally, or through the network. This issue only affects the NFX250 Series vSRX VNF. No other products or platforms are affected. This issue is only applicable to environments where the vSRX VNF root password has not been configured. This issue affects the Juniper Networks NFX250 Network Services Platform vSRX VNF instance on versions prior to 19.2R1.
problem types: CWE-798 Use of Hard-coded Credentials
affected:
{
platforms: NFX250 Series
product: Juniper Networks NFX Series Network Services Platform
vendor: Juniper Networks
versions:
lessThan: 19.2R1, status: affected, version: unspecified, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 10
baseSeverity: CRITICAL
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
version: 3.1
]
exploits: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
solutions: The following software releases have been updated to resolve this specific issue: NFX250 Series version 19.2R1, and all subsequent releases.
By upgrading, the hard-coded password is removed from the configuration.
workarounds: Configure a new password for the device by referring to https://www.juniper.net/documentation/en_US/release-independent/junos/topics/task/configuration/nfx250-configure-vsrx-internal-ip.html .
Additionally, to reduce the risk of exploitability of this issue, customers may choose to implement firewall filters / ACLs to limit administrative access to the VNF vSRX instance to only trusted hosts, networks and administrators.  Disable unnecessary services not required to administer the system, until such time that either a password change can take place, or the fixed software is applied during a maintenance window.