CVE-2018-8836

moderate-risk
Published 2018-04-03

Wago 750 Series PLCs with firmware version 10 and prior include a remote attack may take advantage of an improper implementation of the 3 way handshake during a TCP connection affecting the communications with commission and service tools. Specially crafted packets may also be sent to Port 2455/TCP/IP, used in Codesys management software, which may result in a denial-of-service condition of communications with commissioning and service tools.

Do I need to act?

~
2.0% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (8)

Affected Vendors

Wago

References (6)

Third Party Advisory http://www.securityfocus.com/bid/103726
Third Party Advisory https://ics-cert.us-cert.gov/advisories/ICSA-18-088-01
Vendor Advisory https://www.wago.com/medias/Vulnerability-in-the-WAGO-Ethernet-TCP-IP-driver.pdf...
Third Party Advisory http://www.securityfocus.com/bid/103726
Third Party Advisory https://ics-cert.us-cert.gov/advisories/ICSA-18-088-01
Vendor Advisory https://www.wago.com/medias/Vulnerability-in-the-WAGO-Ethernet-TCP-IP-driver.pdf...
40
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 5/34 · Minimal
Exposure 14/34 · Moderate