Medium severity · published Apr 3, 2018
CVE-2018-8836
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…
5.3
CVSS
3.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.7% · higher than 90% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
7F
750-829 Firmware · Wago
through 10 · source: NVD
7F
750-831 Firmware · Wago
through 10 · source: NVD
7F
750-852 Firmware · Wago
through 10 · source: NVD
7F
750-880 Firmware · Wago
through 10 · source: NVD
7F
750-881 Firmware · Wago
through 10 · source: NVD
7F
750-882 Firmware · Wago
through 10 · source: NVD
7F
750-885 Firmware · Wago
through 10 · source: NVD
7F
750-889 Firmware · Wago
through 10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-8836
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-8836
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?context=bWFzdGVyfHJvb3R8MjgxNDk0fGFwcGxpY2F0aW9uL3BkZnxoOTcvaDhkLzkxNTAyMjMyMjA3NjYucGRmfGRlNWQ4ODc0NTE5M2UyNTUwNTIyNDRlOWFkNWI2YjNkMzg0YTVhYzlmYTBjNzM4MDdmNmYzOTM5M2ZlMGEzNzE
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