Improper resource shutdown or release in WAGO products - CVE-2018-8836

Vulnerability identifier: #VU11401

CSH Severity: Low

CVSS v4.0: 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

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: WAGO

Affected software:
WAGO PLC Series 750-880
WAGO PLC Series 750-881
WAGO PLC Series 750-852
WAGO PLC Series 750-882
WAGO PLC Series 750-885
WAGO PLC Series 750-831
WAGO PLC Series 750-889
WAGO PLC Series 750-829

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.

Install update from vendor's website.

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