Vulnerability identifier: #VU48139

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12516

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WAGO PLC Series 750-352
Hardware solutions / Firmware
WAGO PLC Series 750-831
Hardware solutions / Firmware
WAGO PLC Series 750-852
Hardware solutions / Firmware
WAGO PLC Series 750-880
Hardware solutions / Firmware
WAGO PLC Series 750-881
Hardware solutions / Firmware
WAGO PLC Series 750-889
Hardware solutions / Firmware

Vendor: WAGO

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can send specially crafted packets, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WAGO PLC Series 750-352: FW10

WAGO PLC Series 750-831: FW10

WAGO PLC Series 750-852: FW10

WAGO PLC Series 750-880: FW10

WAGO PLC Series 750-881: FW10

WAGO PLC Series 750-889: FW10

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External links
http://ics-cert.us-cert.gov/advisories/icsa-20-308-01
http://cert.vde.com/en-us/advisories/vde-2020-042

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.