Detections
Analytics

WAGO Series 750-88x and 750-352 Uncontrolled Resource Consumption (CVE-2020-12516)

high Tenable OT Security Plugin ID 500701

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Older firmware versions (FW1 up to FW10) of the WAGO PLC family 750-88x and 750-352 are vulnerable for a special denial of service attack.

 - Older firmware versions (FW1 up to FW10) of the WAGO PLC family 750-88x and 750-352 are vulnerable for a special denial of service attack. (CVE-2020-12516)

This plugin only works with Tenable.ot. Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

WAGO recommends updating to the latest firmware, Version FW14

Other mitigations and workarounds are available to help reduce the risk:

- Restrict network access to the device.
- Do not directly connect the device to the Internet.
- Disable unused TCP/UDP ports.

CERT@VDE has published an advisory regarding this vulnerability.

See Also

https://cert.vde.com/en-us/advisories/vde-2020-042

https://us-cert.cisa.gov/ics/advisories/icsa-20-308-01

Plugin Details

Severity: High

ID: 500701

Version: 1.7

Type: remote

Family: Tenable.ot

Published: 10/8/2022

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2020-12516

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:wago:750-331_firmware, cpe:/o:wago:750-352_firmware, cpe:/o:wago:750-829_firmware, cpe:/o:wago:750-831_firmware, cpe:/o:wago:750-852_firmware, cpe:/o:wago:750-880_firmware, cpe:/o:wago:750-881_firmware, cpe:/o:wago:750-882_firmware, cpe:/o:wago:750-885_firmware, cpe:/o:wago:750-889_firmware

Required KB Items: Tenable.ot/Wago

Exploit Ease: No known exploits are available

Patch Publication Date: 12/10/2020

Vulnerability Publication Date: 12/10/2020

Reference Information

CVE: CVE-2020-12516