Vulnerability Details : CVE-2019-6843
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 controller with an empty firmware package using FTP protocol.
Vulnerability category: Denial of service
Products affected by CVE-2019-6843
- cpe:2.3:o:schneider-electric:modicon_m580_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:schneider-electric:modicon_m340_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:schneider-electric:modicon_bmxcra_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:schneider-electric:modicon_140cra_firmware:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-6843
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 34 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-6843
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.0
|
MEDIUM | AV:N/AC:L/Au:S/C:N/I:N/A:P |
8.0
|
2.9
|
NIST | |
|
4.9
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H |
1.2
|
3.6
|
NIST |
CWE ids for CVE-2019-6843
-
The product does not handle or incorrectly handles an exceptional condition.Assigned by:
- cybersecurity@se.com (Secondary)
- nvd@nist.gov (Primary)
References for CVE-2019-6843
-
https://www.se.com/ww/en/download/document/SEVD-2019-281-02/
Security Notification - Modicon Controllers (V2.1) | Schneider ElectricVendor Advisory
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