Siemens SCALANCE Privilege Escalation (CVE-2013-3633)

critical Tenable OT Security Plugin ID 500736

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (Versions < V5.0.0 for CVE-2013-3633 and versions < V4.5.0 for CVE-2013-3634), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions < V5.1.0). The user privileges for the web interface are only enforced on client side and not properly verified on server side. Therefore, an attacker is able to execute privileged commands using an unprivileged account.

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 recommends updating these products:

- SCALANCE X-200 switch family: Update to v5.0.0 (released in 2013), or any later version (currently v5.2.4)
- SCALANCE X-200IRT switch family: Update to v5.1.0 (released in 2013), or any later version (currently v5.4.2)

If it is not possible to install the firmware update, mitigate the SNMP vulnerability by either disabling SNMP or completely disabling read-write access.

As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’

Operational Guidelines for Industrial Security and to follow the recommendations in the product manuals.

Additional information on industrial security by Siemens can be found at:

https://www.siemens.com/industrialsecurity

For more information on this vulnerability and more detailed mitigation instructions, please see Siemens security advisory SSA-170686 at the following location:

http://www.siemens.com/cert/advisories

Plugin Details

Severity: Critical

ID: 500736

Version: 1.5

Type: remote

Family: Tenable.ot

Published: 1/25/2023

Updated: 12/14/2023

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 8

Temporal Score: 5.9

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

CVSS Score Source: CVE-2013-3633

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: cpe:/o:siemens:scalance_x200_series_firmware, cpe:/o:siemens:scalance_x200irt_series_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 5/24/2013

Vulnerability Publication Date: 5/24/2013

Reference Information

CVE: CVE-2013-3633

CWE: 264

Detections

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