CVE-2020-7541
No known exploitation. EPSS puts it in the 58th percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
A CWE-425: Direct Request ('Forced Browsing') vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause disclosure of sensitive data when sending a specially crafted request to the controller over HTTP.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.9% chance of exploitation activity in the next 30 days, which ranks it in the 58th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
5 events over 1441 days, from the signal feeds we watch.
- Patch availablerecord updated
- Publishedweakness classified, att&ck mapped
Affected products
- modicon m340 bmxp341000 firmwareICS / OT / IoT
- modicon m340 bmxp342000 firmwareICS / OT / IoT
- modicon m340 bmxp3420102 firmwareICS / OT / IoT
- modicon m340 bmxp3420102cl firmwareICS / OT / IoT
- modicon m340 bmxp342020 firmwareICS / OT / IoT
- modicon m340 bmxp3420302 firmwareICS / OT / IoT
- modicon m340 bmxp3420302cl firmwareICS / OT / IoT
- bmxnoe0100 firmwareICS / OT / IoT
And 13 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Scored 5.3 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality LowSome restricted information is disclosed, but limited in scope
- Integrity NoneNo integrity impact
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1190Exploit Public-Facing Applicationmedium confidence
Sources
References in the record
- se.com/ww/en/download/document/SEVD-2020-343-03/
- download.schneider-electric.com/files?p_enDocType=Technical+leaflet&p_File_Name=SEVD-2020-343-03_Web_Server_Modicon_M340_Premium_Quantum_Communication_Modules_Security_Notification.pdf&p_Doc_Ref=SEVD-2020-343-03&
- se.com/ww/en/work/support/cybersecurity/security-notifications.jsp
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