4.9
MEDIUM
CVE-2019-6841
Modicon PLC Denial of Service Throwaway Firmware Upgrade Exception
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.

INFO

Published Date :

Oct. 29, 2019, 7:15 p.m.

Last Modified :

Nov. 21, 2024, 4:47 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

1.2
Affected Products

The following products are affected by CVE-2019-6841 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Schneider-electric modicon_m580_firmware
2 Schneider-electric modicon_m340_firmware
3 Schneider-electric modicon_bmxcra_firmware
4 Schneider-electric modicon_140cra_firmware
5 Schneider-electric modicon_m340
6 Schneider-electric modicon_m580
7 Schneider-electric modicon_bmxcra
8 Schneider-electric modicon_140cra
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2019-6841.

URL Resource
https://www.se.com/ww/en/download/document/SEVD-2019-281-02/ Vendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2019-281-02/ Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2019-6841 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2019-6841 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://www.se.com/ww/en/download/document/SEVD-2019-281-02/
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Reanalysis by [email protected]

    Feb. 03, 2022

    Action Type Old Value New Value
    Changed CPE Configuration AND OR *cpe:2.3:o:schneider-electric:modicon_m340_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:se:modicon_m340:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:schneider-electric:modicon_m340_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:schneider-electric:modicon_m340:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Jan. 31, 2022

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:schneider-electric:modicon_m340:-:*:*:*:*:*:*:* OR *cpe:2.3:h:se:modicon_m340:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Jan. 31, 2022

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:se:modicon_m340:-:*:*:*:*:*:*:* OR *cpe:2.3:h:schneider-electric:modicon_m340:-:*:*:*:*:*:*:*
  • Modified Analysis by [email protected]

    Sep. 14, 2021

    Action Type Old Value New Value
    Changed Reference Type https://www.se.com/ww/en/download/document/SEVD-2019-281-02/ No Types Assigned https://www.se.com/ww/en/download/document/SEVD-2019-281-02/ Vendor Advisory
  • CPE Deprecation Remap by [email protected]

    Aug. 19, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:schneider-electric:modicon_m340:-:*:*:*:*:*:*:* OR *cpe:2.3:h:se:modicon_m340:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Apr. 19, 2021

    Action Type Old Value New Value
    Changed Description A CWE-248: Uncaught Exception vulnerability exists in Modicon M580, Modicon M340, 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. 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.
    Removed Reference https://www.schneider-electric.com/ww/en/download/document/SEVD-2019-281-02 [Vendor Advisory]
    Added Reference https://www.se.com/ww/en/download/document/SEVD-2019-281-02/ [No Types Assigned]
    Removed CWE Schneider Electric SE CWE-248
    Added CWE Schneider Electric SE CWE-755
    Removed CWE Reason CWE-248 / Assessment performed prior to CVMAP efforts
  • Initial Analysis by [email protected]

    Nov. 01, 2019

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://www.schneider-electric.com/ww/en/download/document/SEVD-2019-281-02 No Types Assigned https://www.schneider-electric.com/ww/en/download/document/SEVD-2019-281-02 Vendor Advisory
    Added CWE NIST CWE-755
    Added CPE Configuration AND OR *cpe:2.3:o:schneider-electric:modicon_m580_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:schneider-electric:modicon_m580:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:schneider-electric:modicon_m340_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:schneider-electric:modicon_m340:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:schneider-electric:modicon_bmxcra_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:schneider-electric:modicon_bmxcra:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:schneider-electric:modicon_140cra_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:schneider-electric:modicon_140cra:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2019-6841 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2019-6841 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.08 }} 0.00%

score

0.33067

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability