#VU11291 Stack-based buffer overflow in Schneider Electric products - CVE-2018-7240
Published: March 28, 2018
Vulnerability identifier: #VU11291
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2018-7240
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Modicon X80 RTU
Modicon M340
Modicon Quantum
Modicon Premium
Modicon X80 RTU
Modicon M340
Modicon Quantum
Modicon Premium
Software vendor:
Schneider Electric
Schneider Electric
Description
The vulnerability allows a remote authenticated attacker to execute arbitrary code on the target system.
The weakness exists due to the FTP server does not limit the length of a command parameter. A remote attacker can supply specially crafted parameters, trigger stack-based buffer overflow and execute arbitrary code with elevated privileges.
The weakness exists due to the FTP server does not limit the length of a command parameter. A remote attacker can supply specially crafted parameters, trigger stack-based buffer overflow and execute arbitrary code with elevated privileges.
Remediation
NCCIC recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
- Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.
- Locate control system networks and remote devices behind firewalls, and isolate them from the business network.
- When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices.