CVE-2023-5909 (GCVE-0-2023-5909)

Vulnerability from cvelistv5 – Published: 2023-11-30 22:05 – Updated: 2026-02-25 17:20
VLAI
Title
Improper Validation of Certificate with Host Mismatch in PTC KEPServerEx
Summary
KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-297 - Improper Validation of Certificate with Host Mismatch
Assigner
References
Impacted products
Credits
Shawn Hoffman
Show details on NVD website
To clipboard 

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https://www.ptc.com/en/support/refdoc/ThingWorx_Kepware_Server/6.15/ThingWorx%20Kepware%20Server%20Secure%20Deployment%20Guide \\n\\nIf additional questions remain, please contact  PTC Technical Support https://support.ptc.com/apps/case_logger_viewer/cs/auth/ssl/log \\n\\nFor more information, see PTC\u0027s  advisory https://www.ptc.com/en/support/article/CS405439 .\\n\\n\\n\\n\\n\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\\n\\n\u003cp\u003ePTC has released and recommends users to update to the following versions:\u003c/p\u003e\u003cul\u003e\u003cli\u003eKEPServerEX should upgrade to v6.15 or later\u003c/li\u003e\u003cli\u003eThingWorx Kepware Server should upgrade to v6.15 or later\u003c/li\u003e\u003cli\u003eThingWorx Industrial Connectivity should upgrade to ThingWorx Kepware Server v6.15 or later\u003c/li\u003e\u003cli\u003eOPC-Aggregator should upgrade to v6.15 or later\u003c/li\u003e\u003cli\u003eThingWorx Kepware Edge: Upgrade to v1.8 or later\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eRefer to secure configuration guide \u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://www.ptc.com/en/support/refdoc/ThingWorx_Kepware_Server/6.15/ThingWorx%20Kepware%20Server%20Secure%20Deployment%20Guide\\\"\u003ehere\u003c/a\u003e\u003c/p\u003e\u003cp\u003eIf additional questions remain, please contact \u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://support.ptc.com/apps/case_logger_viewer/cs/auth/ssl/log?\\\"\u003ePTC Technical Support\u003c/a\u003e\u003c/p\u003e\u003cp\u003eFor more information, see PTC\u0027s \u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://www.ptc.com/en/support/article/CS405439\\\"\u003eadvisory\u003c/a\u003e.\u003c/p\u003e\\n\\n\u003cbr\u003e\", \"base64\": false}]}], \"references\": [{\"url\": \"https://www.cisa.gov/news-events/ics-advisories/icsa-23-334-03\", \"tags\": [\"government-resource\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.1.0-dev\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"\\n\\n\\n\\n\\n\\n\\n\\n\\nKEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.\\n\\n\\n\\n\\n\\n\\n\\n\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\\n\\n\u003cp\u003e\u003c/p\u003e\\n\\n\u003cp\u003e\u003c/p\u003e\\n\\n\u003cp\u003eKEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.\u003c/p\u003e\u003cbr\u003e\\n\\n\u003cbr\u003e\\n\\n\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-297\", \"description\": \"CWE-297 Improper Validation of Certificate with Host Mismatch\"}]}], \"providerMetadata\": {\"orgId\": \"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6\", \"shortName\": \"icscert\", \"dateUpdated\": \"2023-11-30T22:05:59.595Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-5909\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-02-25T17:20:07.195Z\", \"dateReserved\": \"2023-11-01T16:18:45.060Z\", \"assignerOrgId\": \"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6\", \"datePublished\": \"2023-11-30T22:05:59.595Z\", \"assignerShortName\": \"icscert\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.