VDB-231342 · CVE-2023-33920 · ssa-731916

Siemens CP-8031 MASTER MODULE/CP-8050 MASTER MODULE UART Console hard-coded credentials

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.
6.6	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Siemens CP-8031 MASTER MODULE and CP-8050 MASTER MODULE. It has been declared as critical. Affected by this issue is some unknown functionality of the component UART Console. The manipulation results in hard-coded credentials. This vulnerability is reported as CVE-2023-33920. An attack on the physical device is feasible. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Siemens CP-8031 MASTER MODULE and CP-8050 MASTER MODULE (version now known). It has been classified as critical. Affected is some unknown processing of the component UART Console. The manipulation with an unknown input leads to a hard-coded credentials vulnerability. CWE is classifying the issue as CWE-798. The product contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external components, or encryption of internal data. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05), CP-8050 MASTER MODULE (All versions < CPCI85 V05). The affected devices contain the hash of the root password in a hard-coded form, which could be exploited for UART console login to the device. An attacker with direct physical access could exploit this vulnerability.

The weakness was disclosed 06/13/2023 as ssa-731916. The advisory is available at cert-portal.siemens.com. This vulnerability is traded as CVE-2023-33920 since 05/23/2023. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1110.001 by the MITRE ATT&CK project.

Upgrading eliminates this vulnerability.

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Productinfo

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: 6.8
VulDB Meta Temp Score: 6.6

VulDB Base Score: 6.8
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.8
CNA Vector (Siemens AG): 🔍

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: 🔍

Exploitinginfo

Class: Hard-coded credentials
CWE: CWE-798 / CWE-259 / CWE-255
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

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

05/23/2023 🔍
06/13/2023 +21 days 🔍
06/13/2023 +0 days 🔍
06/13/2023 +0 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-731916
Status: Confirmed

CVE: CVE-2023-33920 (🔍)
GCVE (CVE): GCVE-0-2023-33920
GCVE (VulDB): GCVE-100-231342

Entryinfo

Created: 06/13/2023 15:22
Changes: 06/13/2023 15:22 (49)
Complete: 🔍
Cache ID: 216::103