CVE-2022-43608

Root code execution via BJNP integer overflow

Published Mar 29, 2023 · Updated Feb 14, 2025

Integer overflow in the BJNP service in Canon Color imageCLASS MF644Cdw 10.03 allows remote attackers to execute code as root. The service fails to validate user-supplied data, allowing an integer overflow before buffer allocation and a resulting buffer overflow. A network-adjacent position and no authentication are required; successful exploitation grants root execution or crashes the printer.

CVSS severity8.8
High
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in the BJNP service in Canon Color imageCLASS MF644Cdw 10.03 allows remote attackers to execute code as root. The service fails to validate user-supplied data, allowing an integer overflow before buffer allocation and a resulting buffer overflow. A network-adjacent position and no authentication are required; successful exploitation grants root execution or crashes the printer.

The record

CVE
CVE-2022-43608
Published
Mar 29, 2023
Updated
Feb 14, 2025
Vendor
Canon Inc.
Product
Color imageCLASS MF644Cdw
Classifications
CWE-190, T1190
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 2025Record 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=10.03

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Canon Inc. · Color imageCLASS MF644Cdwversion=10.03

Published CVSS scores

8.8NISTCVSS:3.1/AV:A/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.

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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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1190Exploit Public-Facing Application

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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