Siemens LOGO! Insufficiently Protected Credentials (CVE-2017-12734)

high Tenable OT Security Plugin ID 501682

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V1.81.2). An attacker with network access to the integrated web server on port 80/tcp could obtain the session ID of an active user session. A user must be logged in to the web interface. Siemens recommends to use the integrated webserver on port 80/tcp only in trusted networks.

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 provides LOGO!8 BM FS-05 with firmware Version 1.81.2, which fixes the first Insufficiently Protected Credentials vulnerability.

Siemens recommends users update to v8.3 to mitigate the Man-in-the-Middle vulnerability.

NOTE: To update, a new hardware version is required.

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

- Configure the environment according to the recommendations in the Siemens user manual.
- Apply cell protection concept.
- Use VPN for protecting network communication between cells.
- Apply defense-in-depth.

As a general security measure, Siemens strongly recommends protecting network access to the devices with appropriate mechanisms. Siemens advises configuring the environment according to Siemens operational guidelines to run the devices in a protected IT environment.

For more information on these vulnerabilities and more detailed mitigation instructions, please see Siemens Security Advisory SSA-087240

Plugin Details

Severity: High

ID: 501682

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 9/21/2023

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2017-12734

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:H/I:N/A:N

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

Vulnerability Information

CPE: cpe:/o:siemens:logo%218_bm_fs-05_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 8/30/2017

Vulnerability Publication Date: 8/30/2017

Reference Information

CVE: CVE-2017-12734

CWE: 895

Detections

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