CVE-2021-34581

WAGO: Denial of Service vulnerability inside the OpenSSL implementation

Published Aug 31, 2021 CVSS 3.1 · 7.5 High EPSS 1.0% KEV · Not listed
Description
Missing Release of Resource after Effective Lifetime vulnerability in OpenSSL implementation of WAGO 750-831/xxx-xxx, 750-880/xxx-xxx, 750-881, 750-889 in versions FW4 up to FW15 allows an unauthenticated attacker to cause DoS on the device.

Remediation

Vendor Solution

Update the device to the latest FW version ( >FW15 ).


Vendor Workaround

Restrict network access to the device. Do not directly connect the device to the internet Disable unused TCP/UDP-ports Disable Web Based Management ports 80/443 after configuration phase.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-21231 Missing Release of Resource after Effective Lifetime vulnerability in OpenSSL implementation of WAGO 750-831/xxx-xxx, 750-880/xxx-xxx, 750-881, 750-889 in versions FW4 up to FW15 allows an unauthenticated attacker to cause DoS on the device.
History
Type Values Removed Values Added
Metrics epss

{'score': 0.0121}

epss

{'score': 0.01583}