Arbitrary file upload in WebAccess/SCADA - CVE-2019-3940
Published: September 19, 2019
Vulnerability identifier: #VU21206
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2019-3940
CWE-ID: CWE-434
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Advantech Co., Ltd
Affected software:
WebAccess/SCADA
WebAccess/SCADA
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to the "webvrpcs.exe" accepts unauthenticated RPC calls to perform remote file operations including fopen, fseek, ftell, fread, fwrite and fclose. A remote attacker can send a specially crafted RPC call to the application, upload and execute arbitrary file on the system.
How to mitigate CVE-2019-3940
Install updates from vendor's website.