Vulnerability CVE-2018-8836
Published: 2018-04-03

Description:
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.

Type:

CWE-404

 (Improper Resource Shutdown or Release)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
WAGO -> 750-829 firmware 
WAGO -> 750-831 firmware 
WAGO -> 750-852 firmware 
WAGO -> 750-880 firmware 
WAGO -> 750-881 firmware 
WAGO -> 750-882 firmware 
WAGO -> 750-885 firmware 
WAGO -> 750-889 firmware 

 References:
http://www.securityfocus.com/bid/103726
https://ics-cert.us-cert.gov/advisories/ICSA-18-088-01
https://www.wago.com/medias/Vulnerability-in-the-WAGO-Ethernet-TCP-IP-driver.pdf?context=bWFzdGVyfHJvb3R8MjgxNDk0fGFwcGxpY2F0aW9uL3BkZnxoOTcvaDhkLzkxNTAyMjMyMjA3NjYucGRmfGRlNWQ4ODc0NTE5M2UyNTUwNTIyNDRlOWFkNWI2YjNkMzg0YTVhYzlmYTBjNzM4MDdmNmYzOTM5M2ZlMGEzNzE
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