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ID

VAR-202107-1926


TITLE

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

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sources: ZDI: ZDI-21-779

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 BwFreRPT.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-21-779

AFFECTED PRODUCTS

vendor:advantechmodel:webaccessscope: - version: -

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sources: ZDI: ZDI-21-779

CVSS

SEVERITY

CVSSV2

CVSSV3

ZDI: ZDI-21-779
value: CRITICAL

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ZDI: ZDI-21-779
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-21-779

EXTERNAL IDS

db:ZDI_CANid:ZDI-CAN-13039

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db:ZDIid:ZDI-21-779

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sources: ZDI: ZDI-21-779

CREDITS

Natnael Samson (@NattiSamson)

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sources: ZDI: ZDI-21-779

SOURCES

db:ZDIid:ZDI-21-779

LAST UPDATE DATE

2022-05-17T02:05:42.841000+00:00


SOURCES UPDATE DATE

db:ZDIid:ZDI-21-779date:2021-07-07T00:00:00

SOURCES RELEASE DATE

db:ZDIid:ZDI-21-779date:2021-07-05T00:00:00