#VU15890 Resource exhaustion in SIMATIC S7-1200 and SIMATIC S7-1500 CPU - CVE-2018-13815

Vulnerability identifier: #VU15890

Vulnerability risk: Low

CVSSv4.0: 2.7 [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-2018-13815

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC S7-1200
Hardware solutions / Firmware
SIMATIC S7-1500 CPU
Hardware solutions / Firmware

Vendor: Siemens

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to resource exhaustion. A remote attacker can send packets to Port 102/TCP, exhaust the available connection pool by opening a sufficient number of connections to the device and cause the service to crash.

Mitigation
The vulnerability has been fixed in the version 2.6.

Vulnerable software versions

SIMATIC S7-1200: before 2.6

SIMATIC S7-1500 CPU: before 2.6

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External links
https://ics-cert.us-cert.gov/advisories/ICSA-18-317-05

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.