PT-2022-3959 · Advantech · Advantech Deviceon/Iservice

Yuri Kramarz · Published 2022-01-18 · Updated 2022-05-31 · CVE-2021-40396

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Advantech DeviceOn/iService version 1.1.7

Description A privilege escalation issue exists due to incorrect default permission settings, allowing an attacker to elevate privileges using a specially-crafted file. This can be triggered by replacing a file in the system, resulting in escalated privileges to NT SYSTEM authority.

Recommendations For Advantech DeviceOn/iService version 1.1.7, consider restricting access to sensitive files and directories to prevent unauthorized modifications until a patch is available. As a temporary workaround, monitor system file integrity and access logs closely to detect potential exploitation attempts.

Exploit

Fix

Incorrect Default Permissions

Weakness Enumeration

CWE-276

Related Identifiers

BDU:2022-04791

CVE-2021-40396

Affected Products

Advantech Deviceon/Iservice

References · 6

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2021-1408 · Exploit
• https://osv.dev/vulnerability/CVE-2021-40396 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-04791 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-40396 · Security Note
• https://t.me/cvenotify/30924 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2022011913 · Note