CVE-2021-34561: A vulnerability in WirelessHART-Gateway <= 3.0.8 allows to bypass any IP or firewall based access restrictions through DNS rebinding
First published: Tue Aug 31 2021(Updated: )
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.
Credit: info@cert.vde.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Pepperl-fuchs Wha-gw-f2d2-0-as-z2-eth Firmware | <=3.0.8 | |
| Pepperl-fuchs Wha-gw-f2d2-0-as-z2-eth | ||
| Pepperl-fuchs Wha-gw-f2d2-0-as-z2-eth.eip Firmware | <=3.0.8 | |
| Pepperl-fuchs Wha-gw-f2d2-0-as-z2-eth.eip |
Remedy
No update available.
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Reference Links
Frequently Asked Questions
What is CVE-2021-34561?
CVE-2021-34561 is a serious vulnerability in PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.8 that allows attackers to bypass IP or firewall-based access restrictions using DNS Rebinding.
How does CVE-2021-34561 affect PEPPERL+FUCHS WirelessHART-Gateway?
CVE-2021-34561 affects PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.8 if the application is not externally accessible or uses IP-based access restrictions.
What is the severity of CVE-2021-34561?
CVE-2021-34561 has a severity rating of 8.8 (high).
What is DNS Rebinding?
DNS Rebinding is an attack technique where an attacker uses DNS to bypass IP or firewall-based access restrictions by making the victim's browser establish a connection to a malicious website.
Where can I find more information about CVE-2021-34561?
You can find more information about CVE-2021-34561 at the following reference: https://cert.vde.com/en-us/advisories/vde-2021-027
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- vendor/pepperl-fuchs
- canonical/pepperl-fuchs wha-gw-f2d2-0-as-z2-eth firmware
- version/pepperl-fuchs wha-gw-f2d2-0-as-z2-eth firmware/3.0.8
- canonical/pepperl-fuchs wha-gw-f2d2-0-as-z2-eth
- canonical/pepperl-fuchs wha-gw-f2d2-0-as-z2-eth.eip firmware
- version/pepperl-fuchs wha-gw-f2d2-0-as-z2-eth.eip firmware/3.0.8
- canonical/pepperl-fuchs wha-gw-f2d2-0-as-z2-eth.eip