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ID

VAR-202107-1927


TITLE

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

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sources: ZDI: ZDI-21-778

DESCRIPTION

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech WebAccess Node. Authentication is not required to exploit this vulnerability.The specific flaw exists within BwImgExe.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 the current user.

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sources: ZDI: ZDI-21-778

AFFECTED PRODUCTS

vendor:advantechmodel:webaccessscope: - version: -

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sources: ZDI: ZDI-21-778

CVSS

SEVERITY

CVSSV2

CVSSV3

ZDI: ZDI-21-778
value: CRITICAL

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ZDI: ZDI-21-778
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-21-778

EXTERNAL IDS

db:ZDI_CANid:ZDI-CAN-13038

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db:ZDIid:ZDI-21-778

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sources: ZDI: ZDI-21-778

CREDITS

Natnael Samson (@NattiSamson)

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sources: ZDI: ZDI-21-778

SOURCES

db:ZDIid:ZDI-21-778

LAST UPDATE DATE

2022-05-17T02:03:09.159000+00:00


SOURCES UPDATE DATE

db:ZDIid:ZDI-21-778date:2021-07-07T00:00:00

SOURCES RELEASE DATE

db:ZDIid:ZDI-21-778date:2021-07-05T00:00:00