CVE-2019-10991: Advantech WebAccess Client bwclient Stack-based Buffer Overflow Remote Code Execution Vulnerability

Published Jun 28, 2019
·
Updated

In WebAccess/SCADA, Versions 8.3.5 and prior, multiple stack-based buffer overflow vulnerabilities are caused by a lack of proper validation of the length of user-supplied data. Exploitation of these vulnerabilities may allow remote code execution.

Other sources

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech WebAccess Client. Authentication is not required to exploit this vulnerability. The specific flaw exists within bwclient.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.

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech WebAccess Client. Authentication is not required to exploit this vulnerability. The specific flaw exists within bwwebv.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.

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 bwmail.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.

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 bwscrp.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.

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 the implementation of the 0x1138a 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 under the context of Administrator.

Affected Software

2 affected components
Advantech WebAccess
Advantech WebAccess<=8.3.5

Event History

Jun 28, 2019
CVE Published
via MITRE·08:25 PM
Data Sourced
via MITRE·08:25 PM
DescriptionWeakness
Feb 21, 2025
Advisory Published
via ZDI·08:35 AM
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Frequently Asked Questions

1

What is CVE-2019-10991 vulnerability?

CVE-2019-10991 is a stack-based buffer overflow vulnerability in the Advantech WebAccess Client, which allows remote attackers to execute arbitrary code on affected installations without authentication.

2

How severe is the CVE-2019-10991 vulnerability?

The severity level of CVE-2019-10991 vulnerability is critical with a CVSS score of 9.8.

3

What is the affected software for CVE-2019-10991 vulnerability?

The affected software for CVE-2019-10991 vulnerability is Advantech WebAccess with version up to and including 8.3.5.

4

How can remote attackers exploit the CVE-2019-10991 vulnerability?

Remote attackers can exploit the CVE-2019-10991 vulnerability by sending malicious input to the bwclient.exe component via the 0x2711 IOCTL in the webvrpcs process.

5

Are there any references for CVE-2019-10991 vulnerability?

Yes, you can find references for CVE-2019-10991 vulnerability at the following links: - https://www.us-cert.gov/ics/advisories/icsa-19-178-05 - https://www.zerodayinitiative.com/advisories/ZDI-19-586/ - https://www.zerodayinitiative.com/advisories/ZDI-19-588/

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