Improper input validation in SIMATIC S7-400 H and SIMATIC S7-400 - CVE-2018-4850
Published: May 16, 2018
Vulnerability identifier: #VU12761
CSH Severity: Low
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-2018-4850
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists due to improper validation of S7 communication packets. A remote attacker can send a specially crafted S7 communication packet to a communication interface of the CPU and cause the core functionality of the CPU to crash.
Affected software
SIMATIC S7-400 H
SIMATIC S7-400
SIMATIC S7-400
How to mitigate CVE-2018-4850
Install update from vendor's website.