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CVE-2020-7566Date: (C)2020-11-20   (M)2023-12-22


A CWE-334: Small Space of Random Values vulnerability exists in Modicon M221 (all references, all versions) that could allow the attacker to break the encryption keys when the attacker has captured the traffic between EcoStruxure Machine - Basic software and Modicon M221 controller.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 7.3CVSS Score : 4.3
Exploit Score: 2.1Exploit Score: 5.5
Impact Score: 5.2Impact Score: 4.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: ADJACENT_NETWORKAccess Vector: ADJACENT_NETWORK
Attack Complexity: LOWAccess Complexity: MEDIUM
Privileges Required: NONEAuthentication: NONE
User Interaction: REQUIREDConfidentiality: PARTIAL
Scope: UNCHANGEDIntegrity: PARTIAL
Confidentiality: HIGHAvailability: NONE
Integrity: HIGH 
Availability: NONE 
  
Reference:
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-04
https://www.se.com/ww/en/download/document/SEVD-2020-315-05/

CWE    1
CWE-334

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