Denial of service in WAGO 750 Controllers FTP server

1) Resource exhaustion

EUVDB-ID: #VU68283

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-38371

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 in the FTP server. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website once available.

Vulnerable software versions

WAGO PLC Series 750-893: All versions

WAGO PLC Series 750-891: All versions

WAGO PLC Series 750-890: All versions

WAGO PLC Series 750-885: All versions

WAGO PLC Series 750-882: All versions

WAGO PLC Series 750-862: All versions

WAGO PLC Series 750-832: All versions

WAGO PLC Series 750-829: All versions

WAGO PLC Series 750-823: All versions

WAGO PLC Series 750-365: All versions

WAGO PLC Series 750-364: All versions

WAGO PLC Series 750-363: All versions

WAGO PLC Series 750-362: All versions

WAGO PLC Series 750-332: All versions

WAGO PLC Series 750-330: All versions

WAGO PLC Series 750-889: All versions

WAGO PLC Series 750-881: All versions

WAGO PLC Series 750-880: All versions

WAGO PLC Series 750-852: All versions

WAGO PLC Series 750-831: All versions

WAGO PLC Series 750-352: All versions

CPE2.3

• cpe:2.3:h:wago:wago_plc_series_750-893:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-891:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-890:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-885:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-882:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-862:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-832:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-829:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-823:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-365:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-364:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-363:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-362:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-332:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-330:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-889:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-881:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-880:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-852:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-831:*:*:*:*:*:*:*:*
• cpe:2.3:h:wago:wago_plc_series_750-352:*:*:*:*:*:*:*:*

External links

https://ics-cert.kaspersky.com/advisories/2022/10/12/wago-750-controllers-denial-of-service-of-the-ftp-server/

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.