Siemens SIMATIC Products Use of a Broken or Risky Cryptographic Algorithm (CVE-2019-10929)

medium Tenable OT Security Plugin ID 500049

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Affected devices contain a message protection bypass vulnerability due to certain properties in the calculation used for integrity protection. This could allow an attacker in a Man-in-the-Middle position to modify network traffic sent on port 102/tcp to the affected devices.

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 following affected products and recommends users update to the new version:

- SIMATIC WinCC Runtime Advanced: update to v16
- SIMATIC WinCC Runtime Professional: update to v16

- SIMATIC NET PC Software v14: Update to v14 SP1 Update 14 or later version

- SIMATIC STEP 7 (TIA Portal): update to v16
- SIMATIC WinCC (TIA Portal): update to v16
- SIMATIC WinCC OA: update to v3.16 patch 13
- TIM 1531 IRC (incl. SIPLUS NET variants): update to v2.1

Siemens is preparing further updates and recommends users apply the following specific countermeasures to reduce the risk until additional patches are available:

- Apply defense-in-depth

As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. Siemens recommends users configure their environment according to the Siemens Operational Guidelines for Industrial Security and follow the recommendations in the product manuals to operate the devices in a protected environment.

Additional information on industrial security by Siemens can be found at: https://www.siemens.com/industrialsecurity

For further inquiries on security vulnerabilities in Siemens products, please contact the Siemens ProductCERT:
http://www.siemens.com/cert/advisories

For more information on the vulnerability and more detailed mitigation instructions, please see Siemens Security Advisory SSA-273799

Plugin Details

Severity: Medium

ID: 500049

Version: 1.12

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 12/12/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2019-10929

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: cpe:/o:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc2_firmware, cpe:/o:siemens:simatic_s7-1500_firmware, cpe:/o:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc_firmware, cpe:/o:siemens:simatic_cp_1626_firmware, cpe:/o:siemens:simatic_s7-1200_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 8/13/2019

Vulnerability Publication Date: 8/13/2019

Reference Information

CVE: CVE-2019-10929

ICSA: 19-344-04, 19-344-06

Detections

Analytics