Detections
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Siemens SICAM A8000 RTUs Protection Mechanism Failure (CVE-2020-28396)

high Tenable OT Security Plugin ID 500432

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in SICAM A8000 CP-8000 (All versions < V16), SICAM A8000 CP-8021 (All versions < V16), SICAM A8000 CP-8022 (All versions < V16). A web server misconfiguration of the affected device can cause insecure ciphers usage by a users browser. An attacker in a privileged position could decrypt the communication and compromise confidentiality and integrity of the transmitted information.

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 users update to the latest version, v16. Siemens also recommends users configure the browser to accept only secure ciphers.

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 the Siemens operational guidelines for industrial security and following the recommendations in the product manuals.

For additional information, please refer to Siemens Security Advisory SSA-415783

See Also

https://cert-portal.siemens.com/productcert/pdf/ssa-415783.pdf

https://www.cisa.gov/news-events/ics-advisories/icsa-20-343-07

https://www.zerodayinitiative.com/advisories/ZDI-21-062/

Plugin Details

Severity: High

ID: 500432

Version: 1.6

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

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

CVSS Score Source: CVE-2020-28396

CVSS v3

Risk Factor: High

Base Score: 7.3

Temporal Score: 6.4

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

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

Vulnerability Information

CPE: cpe:/o:siemens:sicam_a8000_cp-8000_firmware, cpe:/o:siemens:sicam_a8000_cp-8021_firmware, cpe:/o:siemens:sicam_a8000_cp-8022_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-2020-28396

CWE: 693