Vulnerability identifier: #VU26963

Vulnerability risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-19301

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SCALANCE X-200
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X-200 IRT
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X-300
Hardware solutions / Routers & switches, VoIP, GSM, etc
SIMATIC RF180C
Hardware solutions / Routers & switches, VoIP, GSM, etc
SIMATIC RF182C
Hardware solutions / Routers & switches, VoIP, GSM, etc
SIMATIC CP 443-1 Standard
Server applications / SCADA systems
SIMATIC CP 443-1 Advanced
Server applications / SCADA systems

Vendor: Siemens

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the VxWorks-based Profinet TCP stack can be forced to make resource-intense calls for every incoming packet. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

SCALANCE X-200: All versions

SCALANCE X-200 IRT: All versions

SCALANCE X-300: All versions

SIMATIC CP 443-1 Standard: All versions

SIMATIC CP 443-1 Advanced: All versions

SIMATIC RF180C: All versions

SIMATIC RF182C: All versions

---

External links
http://cert-portal.siemens.com/productcert/pdf/ssa-102233.pdf

---

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.