SB2018051608 - Denial of service in Siemens SIMATIC S7-400 CPUs
Published: May 16, 2018
Security Bulletin ID
SB2018051608
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper input validation (CVE-ID: CVE-2018-4850)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 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/E:P/U:Clear
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.
Remediation
Install update from vendor's website.