Medium severity · published May 22, 2019
CVE-2019-6821
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…
6.5
CVSS
1.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.9% · higher than 80% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MM
Modicon M340 Firmware · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M580 Firmware · Schneider-electric
before 2.30 · source: NVD
MP
Modicon Premium Firmware · Schneider-electric
All versions, or not specified · source: NVD
MQ
Modicon Quantum Firmware · Schneider-electric
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-6821
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-6821
Third Party Advisory
http://www.securityfocus.com/bid/108366
Third Party Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-19-136-01
Patch
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-03/
More from Modicon M340 Firmware
9.8
CVE-2020-7475
A CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'), reflective DLL, vulnerability exists in EcoStruxure Control Expert…
9.8
CVE-2019-6808
A CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause a remote code…
9.8
CVE-2018-7847
A CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause denial of service…
9.8
CVE-2018-7846
A CWE-501: Trust Boundary Violation vulnerability on connection to the Controller exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum and Modicon Premium…
9.8
CVE-2018-7842
A CWE-290: Authentication Bypass by Spoofing vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause an…