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ID

VAR-201902-0943


TITLE

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

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sources: ZDI: ZDI-19-229

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 spchapi.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-19-229

AFFECTED PRODUCTS

vendor:advantechmodel:webaccessscope: - version: -

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sources: ZDI: ZDI-19-229

CVSS

SEVERITY

CVSSV2

CVSSV3

ZDI: ZDI-19-229
value: CRITICAL

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ZDI: ZDI-19-229
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-19-229

EXTERNAL IDS

db:ZDI_CANid:ZDI-CAN-7878

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db:ZDIid:ZDI-19-229

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sources: ZDI: ZDI-19-229

CREDITS

Natnael Samson (@NattiSamson)

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sources: ZDI: ZDI-19-229

SOURCES

db:ZDIid:ZDI-19-229

LAST UPDATE DATE

2022-05-17T02:10:29.035000+00:00


SOURCES UPDATE DATE

db:ZDIid:ZDI-19-229date:2019-05-30T00:00:00

SOURCES RELEASE DATE

db:ZDIid:ZDI-19-229date:2019-02-28T00:00:00