CVE-2022-32959

Code execution via unchecked card OS length

Published Jul 20, 2022 · Updated Sep 17, 2024

Stack-based buffer overflow in affected HiCOS client 3.x builds allows physically proximate attackers to execute arbitrary code. The platform PKCS#11 library reads OS information from an inserted IC card without validating the parameter length, causing data to overrun a stack buffer. Exploitation requires physical access to present a crafted card; successful attacks can execute code, alter system data, or interrupt the client service.

CVSS severity6.8
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in affected HiCOS client 3.x builds allows physically proximate attackers to execute arbitrary code. The platform PKCS#11 library reads OS information from an inserted IC card without validating the parameter length, causing data to overrun a stack buffer. Exploitation requires physical access to present a crafted card; successful attacks can execute code, alter system data, or interrupt the client service.

The record

CVE
CVE-2022-32959
Published
Jul 20, 2022
Updated
Sep 17, 2024
Vendor
Chunghwa Telecom
Product
HiCOS Natural Person Credential Component Client
Classifications
CWE-787, T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=unspecified <=11 3.0.3.30306
  2. Affected versionversion=unspecified <=11 3.0.3.30404
  3. Affected versionversion=unspecified <=11 3.1.0.00002

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Chunghwa Telecom · HiCOS Natural Person Credential Component Clientversion=unspecified <=11 3.0.3.30306; version=unspecified <=11 3.0.3.30404; version=unspecified <=11 3.1.0.00002

Published CVSS scores

6.8TWCERT/CCCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1200Hardware Additions

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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