Resource exhaustion in WAGO products - CVE-2020-12516

Vulnerability identifier: #VU48139

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2020-12516

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

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. A remote attacker can send specially crafted packets, trigger resource exhaustion and perform a denial of service (DoS) attack.

WAGO PLC Series 750-352
WAGO PLC Series 750-831
WAGO PLC Series 750-852
WAGO PLC Series 750-880
WAGO PLC Series 750-881
WAGO PLC Series 750-889

Install updates from vendor's website.

WAGO PLC Series 750-352 - update to FW11
WAGO PLC Series 750-831 - update to FW11
WAGO PLC Series 750-852 - update to FW11
WAGO PLC Series 750-880 - update to FW11
WAGO PLC Series 750-881 - update to FW11
WAGO PLC Series 750-889 - update to FW11

• https://ics-cert.us-cert.gov/advisories/icsa-20-308-01
• https://cert.vde.com/en-us/advisories/vde-2020-042

• Denial of service in WAGO Series 750-88x and 750-352