Denial of service in WAGO 750 Series

1) Improper resource shutdown or release

EUVDB-ID: #VU11401

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-8836

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to an improper implementation of the 3 way handshake during a TCP connection affecting the communications with commission and service tools. A remote attacker can send specially crafted packets to Port 2455/TCP/IP and cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WAGO PLC Series 750-880: 10

WAGO PLC Series 750-881: 10

WAGO PLC Series 750-852: 10

WAGO PLC Series 750-882: 10

WAGO PLC Series 750-885: 10

WAGO PLC Series 750-831: 10

WAGO PLC Series 750-889: 10

WAGO PLC Series 750-829: 10

CPE2.3

• cpe:2.3:h:wago:wago_plc_series_750-880:10:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-881:10:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-852:10:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-882:10:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-885:10:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-831:10:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-889:10:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-829:10:*:*:*:*:*:*:*

External links

https://www.wago.com/medias/Vulnerability-in-the-WAGO-Ethernet-TCP-IP-driver.pdf?context=bWFzdGVyfHJ...

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.