Home/CVE/KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.
CVE

CVE-2023-5909

KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.

KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.

HIGH · CVSS 7.5 EPSS 0.00077
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-295Improper Certificate Validation
CWE-297Improper Validation of Certificate with Host Mismatch
▤

Affected Products & Versions

8
ge industrial gateway server<= 7.614
ptc keepserverex<= 6.14.263.0
ptc opc-aggregator<= 6.14
ptc thingworx industrial connectivityall versions
ptc thingworx kepware edge<= 1.7
ptc thingworx kepware server<= 6.14.263.0
rockwellautomation kepserver enterprise<= 6.14.263.0
softwaretoolbox top server<= 6.14.263.0
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · ics-cert@hq.dhs.gov
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD30 Nov 2023 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
cisa-csafcisa-csaf-csaf_files-OT-white-2023-icsa-23-334-03
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.cisa.gov/news-events/ics-advisories/icsa-23-334-03Third Party AdvisoryUS Government Resource
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