Vulnerability identifier: #VU26965

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19300

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
KTK ATE530S
Hardware solutions / Other hardware appliances
SIDOOR ATD430W
Hardware solutions / Other hardware appliances
SIDOOR ATE530S COATED
Hardware solutions / Other hardware appliances
SIDOOR ATE531S
Hardware solutions / Other hardware appliances
SIMATIC ET200SP IM155-6 MF HF
Hardware solutions / Other hardware appliances
SIMATIC ET 200SP Open Controller CPU 1515SP PC
Hardware solutions / Other hardware appliances
SIMATIC ET200SP IM155-6 PN HA
Hardware solutions / Other hardware appliances
SIMATIC ET200SP IM155-6 PN/2 HF
Hardware solutions / Other hardware appliances
SIMATIC ET200SP IM155-6 PN/3 HF
Hardware solutions / Other hardware appliances
SIMATIC MICRO-DRIVE PDC
Hardware solutions / Other hardware appliances
SIMATIC TDC CPU555
Hardware solutions / Other hardware appliances
SINAMICS S/G Control Unit w. PROFINET
Hardware solutions / Other hardware appliances
SIMATIC ET 200SP Open Controller CPU 1515SP PC2
Server applications / SCADA systems
SIMATIC S7-1500 Software Controller
Server applications / SCADA systems
SIMATIC S7-400 PN/DP V7
Server applications / SCADA systems
SIMATIC S7-400 PN/DP V6
Server applications / SCADA systems
SIMATIC TDC CP51M1
Server applications / SCADA systems
SIMATIC ET200MP IM155-5 PN HF
Hardware solutions / Firmware
SIMATIC ET200SP IM155-6 PN HF
Hardware solutions / Firmware
SIMATIC PN/PN Coupler
Hardware solutions / Firmware
SIMATIC S7-1500 CPU
Hardware solutions / Firmware
SIMATIC S7-300
Hardware solutions / Firmware
SIMATIC S7-410
Hardware solutions / Firmware
SIMATIC WinAC RTX (F) 2010
Hardware solutions / Firmware

Vendor: Siemens

Description

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

The vulnerability exists due to the Interniche-based 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
Install updates from vendor's website.

Vulnerable software versions

KTK ATE530S: All versions

SIDOOR ATD430W: All versions

SIDOOR ATE530S COATED: All versions

SIDOOR ATE531S: All versions

SIMATIC ET200SP IM155-6 MF HF: All versions

SIMATIC ET 200SP Open Controller CPU 1515SP PC: All versions

SIMATIC ET 200SP Open Controller CPU 1515SP PC2: All versions

SIMATIC ET200MP IM155-5 PN HF: 4.2.0

SIMATIC ET200SP IM155-6 PN HA: All versions

SIMATIC ET200SP IM155-6 PN HF: 4.2

SIMATIC ET200SP IM155-6 PN/2 HF: 4.2

SIMATIC ET200SP IM155-6 PN/3 HF: 4.2

SIMATIC MICRO-DRIVE PDC: All versions

SIMATIC PN/PN Coupler: 4.2

SIMATIC S7-1500 CPU: All versions

SIMATIC S7-1500 Software Controller: All versions

SIMATIC S7-300: All versions

SIMATIC S7-400 PN/DP V7: All versions

SIMATIC S7-400 PN/DP V6: All versions

SIMATIC S7-410: All versions

SIMATIC TDC CP51M1: All versions

SIMATIC TDC CPU555: All versions

SIMATIC WinAC RTX (F) 2010: All versions

SINAMICS S/G Control Unit w. PROFINET: All versions

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External links
http://cert-portal.siemens.com/productcert/pdf/ssa-593272.pdf

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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.