Denial of service in WAGO Series 750-88x and 750-352

1) Resource exhaustion

EUVDB-ID: #VU48139

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 - Resource exhaustion

Exploit availability: No

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

External links

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

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.