CVE-2023-0248

Communication-memory disclosure via retained card data

Published Dec 14, 2023 · Updated Oct 8, 2024

Information disclosure in Johnson Controls ioSmart Gen 1 reader before 1.07.02 allows physically proximate attackers to recover communication memory. The firmware fails to release card-to-reader communication data after its effective lifetime, leaving that data recoverable from reader memory. Physical access to the reader is required, and the publicly documented consequence is disclosure of retained communication data.

CVSS severity7.5
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Johnson Controls ioSmart Gen 1 reader before 1.07.02 allows physically proximate attackers to recover communication memory. The firmware fails to release card-to-reader communication data after its effective lifetime, leaving that data recoverable from reader memory. Physical access to the reader is required, and the publicly documented consequence is disclosure of retained communication data.

The record

CVE
CVE-2023-0248
Published
Dec 14, 2023
Updated
Oct 8, 2024
Vendor
Johnson Controls
Product
ioSmart Gen 1 Card Reader
Classifications
CWE-401, CWE-200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.07.02

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Johnson Controls · ioSmart Gen 1 Card Readerversion=0 <1.07.02

Published CVSS scores

7.5Johnson ControlsCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L
5.3NIST NVDCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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