Medium severity · published Oct 29, 2019
CVE-2019-6841
A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 with firmware (version prior to V3.10), Modicon M340 (all firmware versions), and…
4.9
CVSS
23.7%
EPSS
No
On KEV
Description
A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 with firmware (version prior to V3.10), Modicon M340 (all firmware versions), and Modicon BMxCRA and 140CRA modules (all firmware versions), which could cause a Denial of Service attack on the PLC when upgrading the firmware with no firmware image inside the package using FTP protocol.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)23.7% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
M1
Modicon 140cra Firmware · Schneider-electric
All versions, or not specified · source: NVD
MB
Modicon Bmxcra Firmware · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M340 Firmware · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M580 Firmware · Schneider-electric
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-6841
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-6841
Vendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2019-281-02/
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CVE-2019-6842
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