Siemens SIMATIC S7-1200 PLC UDP Denial of Service (CVE-2019-10936)

high Nessus Plugin ID 131775
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The remote web server running on the S7-1200 PLC is affected by a denial of service vulnerability.


The remote host is a Siemens SIMATIC S7-1200 device. It is, therefore, affected by a denial of service vulnerability.
A denial of service (DoS) vulnerability exists due to improper handling of UDP packets. An unauthenticated, remote attacker can exploit this issue, by sending a large amount of specially crafted UDP packets, to cause the device to stop responding.

Note that Nessus has not attempted to exploit this issue but has instead relied only on the device's self-reported version number.


No known fix. Contact Siemens for more information.

See Also

Plugin Details

Severity: High

ID: 131775

File Name: scada_siemens_simatic_s7_1200_plc_SSA-473245.nbin

Version: 1.15

Type: remote

Family: SCADA

Published: 12/6/2019

Updated: 10/19/2021

Dependencies: scada_siemens_simatic_s7_1200_plc_web_server_detect.nbin, scada_siemens_simatic_s7_1200_plc_firmware_detect.nbin

Risk Information

CVSS Score Source: CVE-2019-10936


Risk Factor: Medium

Score: 4.4


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/h:siemens:simatic_s7_1200_cpu, cpe:/o:siemens:simatic_s7_1200_cpu_firmware

Required KB Items: SCADA/Siemens SIMATIC S7-1200 PLC Web Server, Siemens SIMATIC S7-1200 PLC Firmware

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 10/8/2019

Reference Information

CVE: CVE-2019-10936

IAVA: 2019-A-0443