Siemens SIMATIC and SCALANCE Products Inadequate Encryption Strength (CVE-2022-2097)

medium Tenable OT Security Plugin ID 502322

Synopsis

The remote OT asset is affected by a vulnerability.

Description

AES OCB mode for 32-bit x86 platforms using the AES-NI assembly optimised implementation will not encrypt the entirety of the data under some circumstances. This could reveal sixteen bytes of data that was preexisting in the memory that wasn't written. In the special case of 'in place' encryption, sixteen bytes of the plaintext would be revealed. Since OpenSSL does not support OCB based cipher suites for TLS and DTLS, they are both unaffected.

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 released V1.0 SP2 Update 1 for SINEC INS and recommends updating to the latest version.

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

- CVE-2022-45094: Disable the DHCP service of the affected product, if not required.
- CVE-2022-45093: Disable the SFTP service of the affected product, if not required.

As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens' operational guidelines for industrial security and following the recommendations in the product manuals. Siemens has published additional information on industrial security.

For further inquiries on security vulnerabilities in Siemens products, users should contact Siemens ProductCERT.

For more information, see the associated Siemens security advisory SSA-332410 in HTML and CSAF.

Plugin Details

Severity: Medium

ID: 502322

Version: 1.5

Type: remote

Family: Tenable.ot

Published: 7/23/2024

Updated: 9/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 2.2

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-2022-2097

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

Vulnerability Information

CPE: cpe:/o:siemens:siplus_et_200sp_cp_1542sp-1_irc_tx_rail_firmware, cpe:/o:siemens:siplus_et_200sp_cp_1543sp-1_isec_firmware, cpe:/o:siemens:simatic_s7-1500_firmware, cpe:/o:siemens:scalance_xm416-4c_firmware, cpe:/o:siemens:scalance_xr524-8c_firmware, cpe:/o:siemens:simatic_cp_1543sp-1_firmware, cpe:/o:siemens:scalance_xm408-4c_firmware, cpe:/o:siemens:simatic_s7-1500_tm_mfp, cpe:/o:siemens:simatic_cp_1542sp-1_firmware, cpe:/o:siemens:siplus_et_200sp_cp_1543sp-1_isec_tx_rail_firmware, cpe:/o:siemens:scalance_xr526-8c_firmware, cpe:/o:siemens:scalance_xm408-8c_firmware, cpe:/o:siemens:scalance_xr552-12m_firmware, cpe:/o:siemens:simatic_cp_1542sp-1_irc_firmware, cpe:/o:siemens:scalance_xr528-6m_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 1/10/2023

Vulnerability Publication Date: 1/10/2023

Reference Information

CVE: CVE-2022-2097

CWE: 326

ICSA: 23-017-03, 24-165-10, 24-165-11

Detections

Analytics