Advantech WebAccess webvprcs IOCTL 70603 Stack Overflow

critical Nessus Plugin ID 129292
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Synopsis

The remote host is running a SCADA application that is affected by a stack-based buffer overflow vulnerability.

Description

The Advantech WebAccess/SCADA Network Service (webvrpcs.exe) running on the remote host is affected by a stack-based buffer overflow vulnerability due to improper validation of user-supplied data when processing an IOCTL 70603 RPC request. An unauthenticated, remote attacker can exploit this, via a series of crafted requests, to cause a denial of service condition or the execution of arbitrary code.

Note that the software is reportedly affected by additional vulnerabilities; however, this plugin has not tested for these.

Solution

Upgrade to WebAccess/SCADA version 8.4.2 or later.

See Also

http://www.nessus.org/u?6e47d024

Plugin Details

Severity: Critical

ID: 129292

File Name: scada_advantech_webaccess_cve-2019-3975.nbin

Version: 1.46

Type: remote

Family: SCADA

Published: 9/24/2019

Updated: 9/20/2021

Dependencies: scada_advantech_webaccess_webvrpcs_detect.nbin

Risk Information

CVSS Score Source: CVE-2019-3975

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:advantech:webaccess

Exploit Ease: No known exploits are available

Patch Publication Date: 9/10/2019

Vulnerability Publication Date: 9/10/2019

Reference Information

CVE: CVE-2019-3975