Detections
Analytics

Siemens SCALANCE S-600 Uncontrolled Resource Consumption (CVE-2019-13926)

high Tenable OT Security Plugin ID 500901

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in SCALANCE S602 (All versions >= V3.0 and < V4.1), SCALANCE S612 (All versions >= V3.0 and < V4.1), SCALANCE S623 (All versions >= V3.0 and < V4.1), SCALANCE S627-2M (All versions >= V3.0 and < V4.1). Specially crafted packets sent to port 443/tcp of affected devices could cause a Denial-of-Service condition of the web server. A cold reboot is required to restore the functionality of the device.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

Siemens has identified the following specific workarounds and mitigations that customers can apply to reduce the risk:

- For versions v3.0 and higher, Update to v4.1

- Only access links from trusted sources in the browser you use to access the SCALANCE S-600 administration website.
- For SCALANCE S-600 family (S602, S612, S623, S627-2M): migrate to a successor product within the SCALANCE SC-600 family, v2.1 or later version. For details refer to the notice of discontinuation.

For more information on these vulnerabilities and associated software updates, please see Siemens security advisory SSA-591405

See Also

https://cert-portal.siemens.com/productcert/pdf/ssa-591405.pdf

https://www.us-cert.gov/ics/advisories/icsa-20-042-10

Plugin Details

Severity: High

ID: 500901

Version: 1.5

Type: remote

Family: Tenable.ot

Published: 3/27/2023

Updated: 9/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2019-13926

CVSS v3

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: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:siemens:scalance_s627-2m_firmware, cpe:/o:siemens:scalance_s602_firmware, cpe:/o:siemens:scalance_s623_firmware, cpe:/o:siemens:scalance_s612_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 2/11/2020

Vulnerability Publication Date: 2/11/2020

Reference Information

CVE: CVE-2019-13926

CWE: 400

ICSA: 20-042-10