Detections
Analytics
Siemens LOGO! 8 BM Use of Hard-Coded Cryptographic Key (CVE-2020-25231)
medium Tenable OT Security Plugin ID 501673
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 < V8.3), LOGO! Soft Comfort (All versions < V8.3). The encryption of program data for the affected devices uses a static key. An attacker could use this key to extract confidential information from protected program files.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 released updates for the affected products and recommends users update to the latest versions:
- LOGO! 8 BM (incl. SIPLUS variants): Update to v8.3; A new hardware version is required in order to update
- LOGO! Soft Comfort: Update to v8.3
Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:
- Protect access to Port 10005/TCP
- Apply defense-in-depth concept, including protection concept outlined in the system manual.
As a general security measure, Siemens strongly recommends users protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends users configure 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, please see Siemens Security Advisory SSA-480824
See Also
https://cert-portal.siemens.com/productcert/pdf/ssa-480824.pdf
https://www.cisa.gov/news-events/ics-advisories/icsa-20-343-10
Plugin Details
Severity: Medium
ID: 501673
Version: 1.5
Type: remote
Family: Tenable.ot
Published: 9/21/2023
Updated: 9/4/2024
Supported Sensors: Tenable OT Security
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: Low
Base Score: 2.1
Temporal Score: 1.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N
CVSS Score Source: CVE-2020-25231
CVSS v3
Risk Factor: Medium
Base Score: 5.5
Temporal Score: 4.8
Vector: CVSS:3.0/AV:L/AC:L/PR:L/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%21_8_bm_firmware
Required KB Items: Tenable.ot/Siemens
Exploit Ease: No known exploits are available
Patch Publication Date: 12/14/2020
Vulnerability Publication Date: 12/14/2020
Reference Information
CVE: CVE-2020-25231