CVE-2021-34561highCWE-350

CVE-2021-34561: high-severity vulnerability in Phoenix Contact WHA-GW-F2D2-0-AS- Z2-ETH

A vulnerability in WirelessHART-Gateway <= 3.0.8 allows to bypass any IP or firewall based access restrictions through DNS rebinding

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 0.9%
In short

WirelessHART-Gateway versions 3.0.8 and earlier can be accessed by attackers even when protected by firewall or IP restrictions. Attackers exploit DNS Rebinding to trick a user's browser into accessing the restricted device, bypassing security barriers.

Technical detail

DNS Rebinding attack allows remote attackers to bypass IP-based and firewall access controls on WirelessHART-Gateway <= 3.0.8 by manipulating DNS responses to redirect browser requests through the victim's machine. The vulnerability requires user interaction (browser access) and affects systems with network-level protections, potentially exposing gateway administration interfaces to unauthorized access.

Summary generated and translated by AI from the official description.
In PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.8 serious issue exists, if the application 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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Phoenix Contact · WHA-GW-F2D2-0-AS- Z2-ETHPhoenix Contact · WHA-GW-F2D2-0-AS- Z2-ETH.EIP
Related CVEs — Phoenix Contact WHA-GW-F2D2-0-AS- Z2-ETH

In the same product, most dangerous first.

CVE-2021-33555HIGHA vulnerability may allow remote attackers to read arbitrary files on the server of the WirelessHART-GatewayEPSS 1.2%CVE-2021-34565CRITICALIn WirelessHART-Gateway versions 3.0.7 to 3.0.9 hard-coded credentials have been foundEPSS 1.0%CVE-2021-34559MEDIUMA vulnerability in WirelessHART-Gateway <= 3.0.8 may allow remote attackers to rewrite links and URLs in cached pages to arbitrary stringsEPSS 0.8%CVE-2021-34562MEDIUMA vulnerability in WirelessHART-Gateway 3.0.8 it is possible to inject arbitrary JavaScript into the application's responseEPSS 0.6%CVE-2021-34563LOWIn WirelessHART-Gateway versions 3.0.8 and 3.0.9 the HttpOnly flag is missing in a cookie which allows client-side javascript to modify itEPSS 0.2%CVE-2021-34560MEDIUMA vulnerability in WirelessHART-Gateway <= 3.0.9 could lead to information exposure of sensitive informationEPSS 0.2%