PT-2021-20546 · Pepperl+Fuchs · Pepperl+Fuchs Wirelesshart-Gateway

Published 2021-08-31 · Updated 2022-09-29 · CVE-2021-34561

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: PEPPERL+FUCHS WirelessHART-Gateway versions 3.0.8 and earlier

Description: A serious issue exists in the application if it is not externally accessible or uses IP-based access restrictions. Attackers can use DNS Rebinding to bypass any IP or firewall-based access restrictions that may be in place, by proxying through their target's browser.

Recommendations: For PEPPERL+FUCHS WirelessHART-Gateway versions 3.0.8 and earlier, consider implementing additional security measures to restrict access, such as configuring the application to only allow access from trusted sources or networks, until a patch or fix is available. As a temporary workaround, consider restricting browser access to the gateway to minimize the risk of exploitation.

Fix

Weakness Enumeration

CWE-350

Related Identifiers

CVE-2021-34561

Affected Products

Pepperl+Fuchs Wirelesshart-Gateway

References · 4

• https://osv.dev/vulnerability/CVE-2021-34561 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-34561 · Security Note
• https://t.me/cibsecurity/28073 · Telegram Post
• https://cert.vde.com/en-us/advisories/vde-2021-027 · Note