High severity · published Jan 6, 2020
CVE-2019-6856
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium (see security notification for…
7.5
CVSS
1.6%
EPSS
No
On KEV
Description
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium (see security notification for specific versions) which could cause a Denial of Service when writing specific physical memory blocks using Modbus TCP.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 76% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
1F
140cpu65150 Firmware · Schneider-electric
before 3.52 · source: NVD
1F
140cpu65160 Firmware · Schneider-electric
before 3.52 · source: NVD
1F
140cpu65160s Firmware · Schneider-electric
before 3.52 · source: NVD
1F
140cpu65260 Firmware · Schneider-electric
before 3.52 · source: NVD
1F
140cpu65860 Firmware · Schneider-electric
before 3.52 · source: NVD
1F
140cpu67060 Firmware · Schneider-electric
before 3.52 · source: NVD
1F
140cpu67160 Firmware · Schneider-electric
before 3.52 · source: NVD
1F
140cpu67160s Firmware · Schneider-electric
before 3.52 · source: NVD
1F
140cpu67260 Firmware · Schneider-electric
before 3.52 · source: NVD
1F
140cpu67261 Firmware · Schneider-electric
before 3.52; before 3.52 · source: NVD
1F
140cpu67861 Firmware · Schneider-electric
before 3.52 · source: NVD
MM
Modicon M340 Firmware · Schneider-electric
before 3.01 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-6856
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-6856
Vendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2019-344-01
Third Party Advisory
https://www.us-cert.gov/ics/advisories/icsa-20-016-01
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