7.5
HIGH
CVE-2018-7821
SoMachine Basic - CWE-2: Ethernet/IP Denial of Service Vulnerability
Description

An Environment (CWE-2) vulnerability exists in SoMachine Basic, all versions, and Modicon M221(all references, all versions prior to firmware V1.10.0.0) which could cause cycle time impact when flooding the M221 ethernet interface while the Ethernet/IP adapter is activated.

INFO

Published Date :

May 22, 2019, 8:29 p.m.

Last Modified :

Nov. 21, 2024, 4:12 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2018-7821 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2018-7821 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_m221_firmware
2 Schneider-electric somachine_basic
3 Schneider-electric modicon_m221
: Total Affected Vendor : 1 | Products : 3
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-2018-7821.

URL Resource
https://www.schneider-electric.com/en/download/document/SEVD-2019-045-01/ Vendor Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-045-01/ 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).

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n0-traces/cve_monitor

Automatic monitor github cve using Github Actions

Python

Updated: 1 month, 2 weeks ago
1 stars 57 fork 57 watcher
Born at : April 7, 2021, 11:16 a.m. This repo has been linked 1008 different CVEs too.

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

The following list is the news that have been mention CVE-2018-7821 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2018-7821 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.schneider-electric.com/en/download/document/SEVD-2019-045-01/
  • CVE Modified by [email protected]

    May. 14, 2024

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

    Jan. 31, 2022

    Action Type Old Value New Value
    Removed CVSS V3 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed CPE Configuration AND OR *cpe:2.3:o:schneider-electric:modicon_m221_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.10.0.0 OR cpe:2.3:h:se:modicon_m221:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:schneider-electric:modicon_m221_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.10.0.0 OR cpe:2.3:h:schneider-electric:modicon_m221:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Jan. 31, 2022

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:se:modicon_m221_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.10.0.0 OR *cpe:2.3:o:schneider-electric:modicon_m221_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.10.0.0
  • CPE Deprecation Remap by [email protected]

    Jan. 31, 2022

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:schneider-electric:modicon_m221_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.10.0.0 OR *cpe:2.3:o:se:modicon_m221_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.10.0.0
  • CPE Deprecation Remap by [email protected]

    Jan. 31, 2022

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:se:modicon_m221_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.10.0.0 OR *cpe:2.3:o:schneider-electric:modicon_m221_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.10.0.0
  • 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_m221:-:*:*:*:*:*:*:* OR *cpe:2.3:h:se:modicon_m221:-:*:*:*:*:*:*:*
  • 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_m221:-:*:*:*:*:*:*:* OR *cpe:2.3:h:schneider-electric:modicon_m221:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Jan. 31, 2022

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

    Aug. 23, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:schneider-electric:somachine_basic:*:*:*:*:*:*:*:* OR *cpe:2.3:a:se:somachine_basic:*:*:*:*:*:*:*:*
  • 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_m221:-:*:*:*:*:*:*:* OR *cpe:2.3:h:se:modicon_m221:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 19, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:schneider-electric:modicon_m221_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.10.0.0 OR *cpe:2.3:o:se:modicon_m221_firmware:*:*:*:*:*:*:*:* versions from (excluding) 1.10.0.0
  • CWE Remap by [email protected]

    Aug. 24, 2020

    Action Type Old Value New Value
    Changed CWE CWE-399 CWE-770
  • Initial Analysis by [email protected]

    May. 23, 2019

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://www.schneider-electric.com/en/download/document/SEVD-2019-045-01/ No Types Assigned https://www.schneider-electric.com/en/download/document/SEVD-2019-045-01/ Vendor Advisory
    Added CWE CWE-399
    Added CPE Configuration OR *cpe:2.3:a:schneider-electric:somachine_basic:*:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:schneider-electric:modicon_m221_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.10.0.0 OR cpe:2.3:h:schneider-electric:modicon_m221:-:*:*:*:*:*:*:*
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-2018-7821 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-2018-7821 weaknesses.

CAPEC-125: Flooding Flooding CAPEC-130: Excessive Allocation Excessive Allocation CAPEC-147: XML Ping of the Death XML Ping of the Death CAPEC-197: Exponential Data Expansion Exponential Data Expansion CAPEC-229: Serialized Data Parameter Blowup Serialized Data Parameter Blowup CAPEC-230: Serialized Data with Nested Payloads Serialized Data with Nested Payloads CAPEC-231: Oversized Serialized Data Payloads Oversized Serialized Data Payloads CAPEC-469: HTTP DoS HTTP DoS CAPEC-482: TCP Flood TCP Flood CAPEC-486: UDP Flood UDP Flood CAPEC-487: ICMP Flood ICMP Flood CAPEC-488: HTTP Flood HTTP Flood CAPEC-489: SSL Flood SSL Flood CAPEC-490: Amplification Amplification CAPEC-491: Quadratic Data Expansion Quadratic Data Expansion CAPEC-493: SOAP Array Blowup SOAP Array Blowup CAPEC-494: TCP Fragmentation TCP Fragmentation CAPEC-495: UDP Fragmentation UDP Fragmentation CAPEC-496: ICMP Fragmentation ICMP Fragmentation CAPEC-528: XML Flood XML Flood
Exploit Prediction

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

0.10 }} 0.00%

score

0.40663

percentile

CVSS31 - Vulnerability Scoring System
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