Out-of-bounds write in WebAccess HMI Designer - CVE-2018-8837
Published: April 25, 2018
Vulnerability identifier: #VU12175
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2018-8837
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Advantech Co., Ltd
Affected software:
WebAccess HMI Designer
WebAccess HMI Designer
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to out-of-bounds write when handling malicious input. A remote attacker can trick the victim into processing specially crafted .pm3 files, cause the system to write outside the intended buffer area and execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may result in system compromise.
The weakness exists due to out-of-bounds write when handling malicious input. A remote attacker can trick the victim into processing specially crafted .pm3 files, cause the system to write outside the intended buffer area and execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may result in system compromise.
How to mitigate CVE-2018-8837
NCCIC recommends that 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.