CVE-2024-8935
No known exploitation. EPSS puts it in the 40th 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
CWE-290: Authentication Bypass by Spoofing vulnerability exists that could cause a denial of service and loss of confidentiality and integrity of controllers when conducting a Man-In-The-Middle attack between the controller and the engineering workstation while a valid user is establishing a communication session. This vulnerability is inherent to Diffie Hellman algorithm which does not protect against Man-In-The-Middle attacks.
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
0.5% chance of exploitation activity in the next 30 days, which ranks it in the 40th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
6 events over 589 days, from the signal feeds we watch.
- OpenVAS check added
- Patch availablepublished, weakness classified, att&ck mapped, record updated
Affected products
- Modicon M340 CPU (part numbers BMXP34*)ICS / OT / IoT
- Modicon MC80 (part numbers BMKC80)ICS / OT / IoT
- Modicon Momentum Unity M1E Processor (171CBU*)ICS / OT / IoT
- Modicon M340 CPU BMXP34ICS / OT / IoT
- Modicon M340 CPU ControllerICS / OT / IoT
- Modicon MC80 ControllerICS / OT / IoT
- Modicon Momentum Unity M1E Processor ControllerICS / OT / IoT
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Scored 7.5 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction RequiredA user must click a link, open a file, or perform some action
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1078Valid Accountsmedium confidence
Sources
References in the record
- download.schneider-electric.com/doc/SEVD-2024-317-02/SEVD-2024-317-02.pdf
- download.schneider-electric.com/files?p_Doc_Ref=SEVD-2024-317-02&p_enDocType=Security+and+Safety+Notice&p_File_Name=sevd-2024-317-02.json
- download.schneider-electric.com/files?p_Doc_Ref=SEVD-2024-317-02&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2024-317-02.pdf
And 14 more references. See all after sign-in
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