VDB-171053 · CVE-2020-27632 · ssa-599268

Siemens SIMATIC MV400 up to 7.0.5 ISN Generator initialization

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Siemens SIMATIC MV400 up to 7.0.5. This vulnerability affects unknown code of the component ISN Generator. The manipulation leads to initialization. This vulnerability is listed as CVE-2020-27632. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Siemens SIMATIC MV400 up to 7.0.5 (SCADA Software). It has been rated as problematic. This issue affects an unknown functionality of the component ISN Generator. The manipulation with an unknown input leads to a initialization vulnerability. Using CWE to declare the problem leads to CWE-665. The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used. Impacted is confidentiality, integrity, and availability.

The weakness was presented 03/11/2021 as ssa-599268. The advisory is shared at cert-portal.siemens.com. The identification of this vulnerability is CVE-2020-27632. Neither technical details nor an exploit are publicly available.

Upgrading to version 7.0.6 eliminates this vulnerability.

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Productinfo

Type

SCADA Software

Vendor

Siemens

Name

SIMATIC MV400

Version

License

commercial

Website

Vendor: https://www.siemens.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Initialization
CWE: CWE-665
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: SIMATIC MV400 7.0.6

Timelineinfo

10/22/2020 🔍
03/11/2021 +140 days 🔍
03/11/2021 +0 days 🔍
03/30/2021 +19 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-599268
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2020-27632 (🔍)
GCVE (CVE): GCVE-0-2020-27632
GCVE (VulDB): GCVE-100-171053

Entryinfo

Created: 03/11/2021 09:16
Updated: 03/30/2021 22:36
Changes: 03/11/2021 09:16 (39), 03/30/2021 22:30 (6), 03/30/2021 22:36 (18)
Complete: 🔍
Cache ID: 216::103