VDB-196901 · CVE-2021-40368 · ssa-557541

Siemens SIMATIC S7-400 H V6 CPU Service Port 102 memory corruption

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.
6.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Siemens SIMATIC S7-400 H V6 CPU, SIMATIC S7-400 PN-DP V7 CPU, SIMATIC S7-410 V10 CPU and SIMATIC S7-410 V8 CPU. It has been classified as critical. Affected by this issue is some unknown functionality of the component Service Port 102. The manipulation leads to memory corruption. This vulnerability is documented as CVE-2021-40368. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Siemens SIMATIC S7-400 H V6 CPU, SIMATIC S7-400 PN-DP V7 CPU, SIMATIC S7-410 V10 CPU and SIMATIC S7-410 V8 CPU (SCADA Software) (unknown version). It has been rated as critical. This issue affects an unknown code block of the component Service Port 102. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability.

The weakness was released 04/12/2022 as ssa-557541. The advisory is shared at cert-portal.siemens.com. The identification of this vulnerability is CVE-2021-40368 since 09/01/2021. Neither technical details nor an exploit are publicly available.

Upgrading eliminates this vulnerability.

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Productinfo

Type

SCADA Software

Vendor

Siemens

Name

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: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

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: 🔍

Timelineinfo

09/01/2021 🔍
04/12/2022 +223 days 🔍
04/12/2022 +0 days 🔍
04/14/2022 +2 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-557541
Status: Confirmed

CVE: CVE-2021-40368 (🔍)
GCVE (CVE): GCVE-0-2021-40368
GCVE (VulDB): GCVE-100-196901

Entryinfo

Created: 04/12/2022 13:00
Updated: 04/14/2022 11:00
Changes: 04/12/2022 13:00 (39), 04/14/2022 11:00 (1)
Complete: 🔍
Cache ID: 216::103