PT-2021-4647 · Advantech · Advantech Webaccess

Nattisamson · Published 2021-09-03 · Updated 2021-09-20 · CVE-2021-38408

Positive Technologies (AI Summary)

CVSS v3.1

10

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 versions 9.02 and prior

Description The issue is caused by a stack-based buffer overflow vulnerability due to a lack of proper validation of the length of user-supplied data. This may allow a remote attacker to execute arbitrary code.

Recommendations For Advantech WebAccess versions 9.02 and prior, update to a version that includes a fix for the stack-based buffer overflow vulnerability to prevent remote code execution. As a temporary workaround, consider restricting access to the affected software to minimize the risk of exploitation.

Fix

RCE

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

BDU:2021-05338

CVE-2021-38408

ZDI-21-1054

Affected Products

Advantech Webaccess

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2021-38408 · Security Note
• https://bdu.fstec.ru/vul/2021-05338 · Security Note
• https://osv.dev/vulnerability/CVE-2021-38408 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-21-1054 · Security Note
• https://t.me/cvenotify/21161 · Telegram Post
• https://t.me/cibsecurity/28585 · Telegram Post
• https://us-cert.cisa.gov/ics/advisories/icsa-21-245-03 · Note