Vulnerability CVE-2019-6821
Published: 2019-05-22

Description:
CWE-330: Use of Insufficiently Random Values vulnerability, which could cause the hijacking of the TCP connection when using Ethernet communication in Modicon M580 firmware versions prior to V2.30, and all firmware versions of Modicon M340, Modicon Premium, Modicon Quantum.

Type:

CWE-330

 (Use of Insufficiently Random Values)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Schneider-electric -> Modicon m340 firmware 
Schneider-electric -> Modicon premium firmware 
Schneider-electric -> Modicon quantum firmware 

 References:
http://www.securityfocus.com/bid/108366
https://ics-cert.us-cert.gov/advisories/ICSA-19-136-01
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-03/
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