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ID

VAR-201912-2034


TITLE

(0Day) Advantech WebAccess Node BwOpcBs Stack-based Buffer Overflow Remote Code Execution Vulnerability

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sources: ZDI: ZDI-19-1010

DESCRIPTION

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Advantech WebAccess Node. Authentication is not required to exploit this vulnerability.The specific flaw exists within BwOpcBs.exe, which is accessed through the 0x2711 IOCTL in the webvrpcs process. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of Administrator.

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sources: ZDI: ZDI-19-1010

AFFECTED PRODUCTS

vendor:advantechmodel:webaccessscope: - version: -

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sources: ZDI: ZDI-19-1010

CVSS

SEVERITY

CVSSV2

CVSSV3

ZDI: ZDI-19-1010
value: CRITICAL

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ZDI: ZDI-19-1010
baseSeverity: CRITICAL
baseScore: 9.8
vectorString: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: 3.9
impactScore: 5.9
version: 3.0

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sources: ZDI: ZDI-19-1010

EXTERNAL IDS

db:ZDI_CANid:ZDI-CAN-7883

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db:ZDIid:ZDI-19-1010

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sources: ZDI: ZDI-19-1010

CREDITS

Mat Powell of Trend Micro Zero Day Initiative

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sources: ZDI: ZDI-19-1010

SOURCES

db:ZDIid:ZDI-19-1010

LAST UPDATE DATE

2022-05-17T01:46:21.009000+00:00


SOURCES UPDATE DATE

db:ZDIid:ZDI-19-1010date:2019-12-12T00:00:00

SOURCES RELEASE DATE

db:ZDIid:ZDI-19-1010date:2019-12-12T00:00:00