← back
CVE-2021-34561highCWE-350

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

21Vexday Risk Score

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

ssvc Trackcvss 7.5epss 0.9%
exploitation probability
0.9%top 45% of all CVEs
observed exploitation
nono source reports it
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