PT-2019-3572 · Advantech · Advantech Webaccess/Scada+1

Published 2019-03-07 · Updated 2021-07-21 · CVE-2019-3975

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Advantech WebAccess/SCADA version 8.4.1

Description The issue is related to a stack-based buffer overflow that allows a remote, unauthenticated attacker to execute arbitrary code via a crafted IOCTL 70603 RPC message. This is due to improper validation of user-provided data before copying it into a fixed-size buffer in the BwPAlarm.dll library. The exploitation of this issue can enable a remote attacker to execute arbitrary code using a specially crafted RPC message.

Recommendations For Advantech WebAccess/SCADA version 8.4.1, consider disabling the GetUserPasswd function in the BwPAlarm.dll library as a temporary workaround until a patch is available. Restrict access to the IOCTL 70603 RPC endpoint to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Buffer Overflow

Weakness Enumeration

CWE-787

CWE-120

Related Identifiers

BDU:2019-03774

CVE-2019-3975

Affected Products

Advantech Webaccess/Scada

Bwpalarm.Dll

References · 4

• 🔥 https://tenable.com/security/research/tra-2019-41 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2019-3975 · Security Note
• https://osv.dev/vulnerability/CVE-2019-3975 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-03774 · Security Note