title: PiiGAB M-Bus Code Injection
description:
PiiGAB M-Bus
SoftwarePack 900S
does not correctly sanitize user input, which could allow an attacker to inject arbitrary commands.
problem types: CWE-94 Code Injection
affected:
{
defaultStatus: unaffected
product: M-Bus SoftwarePack
vendor: PiiGAB
versions:
status: affected, version: 900S
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.8
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL
solutions:
PiiGAB created updated software to address these issues and encourages users to install the new update on their own gateway. The new software packages can be downloaded directly from the web UI in the gateway and older gateways can download it from  Piigab.se http://www.piigab.se/  or  Piigab.com https://www.piigab.com/ .
workarounds:
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
*  Ensure the least-privilege user principle is followed.
*  Set unique and secure passwords for all products requiring authentication.
*  Minimize network exposure for all control system devices and/or systems, and ensure they are  not accessible from the Internet https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01 .
*  Locate control system networks and remote devices behind firewalls and isolate them from business networks.
*  When remote access is required, use secure methods, such as virtual private networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices.