CyberSecBulletin
CVE-2022-24672NVD status: Modified

imageCLASS MF644Cdw: Out-of-bounds Write

Published Updated By the CyberSecBulletin desk

CVE-2022-24672 is a high-severity out-of-bounds write vulnerability in imageCLASS MF644Cdw from Canon, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. Affected imageCLASS MF644Cdw versions: 10.02. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.19% chance of exploitation within 30 days, higher than 69% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of imageCLASS MF644Cdw you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on usa.canon.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
CanonimageCLASS MF644Cdw10.02Not stated
CanonD1620 FirmwareNot specified in the recordNot stated
CanonD1650 FirmwareNot specified in the recordNot stated
CanonD1520 FirmwareNot specified in the recordNot stated
CanonD1550 FirmwareNot specified in the recordNot stated
CanonMf1127c FirmwareNot specified in the recordNot stated
CanonMf1238 FirmwareNot specified in the recordNot stated
CanonMf1238 Ii FirmwareNot specified in the recordNot stated
CanonMf1643i Ii FirmwareNot specified in the recordNot stated
CanonMf1643if Ii FirmwareNot specified in the recordNot stated
CanonMf414dw FirmwareNot specified in the recordNot stated
CanonMf416dw FirmwareNot specified in the recordNot stated
CanonMf419dw FirmwareNot specified in the recordNot stated
CanonMf515dw FirmwareNot specified in the recordNot stated
CanonMf424dw FirmwareNot specified in the recordNot stated
CanonMf426dw FirmwareNot specified in the recordNot stated
CanonMf429dw FirmwareNot specified in the recordNot stated
CanonMf525dw FirmwareNot specified in the recordNot stated
CanonMf445dw FirmwareNot specified in the recordNot stated
CanonMf448dw FirmwareNot specified in the recordNot stated
CanonMf449dw FirmwareNot specified in the recordNot stated
CanonMf543dw FirmwareNot specified in the recordNot stated
CanonMf451dw FirmwareNot specified in the recordNot stated
CanonMf452dw FirmwareNot specified in the recordNot stated
CanonMf453dw FirmwareNot specified in the recordNot stated

Version data comes from the organisation that assigned the CVE; 35 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
AdjacentThe attacker must be on the same local network segment.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.18.8HighNVD
CVSS 3.08.8HighCNA (trendmicro.com)

Official description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Canon imageCLASS MF644Cdw 10.02 printers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the CADM service. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-15802.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

How developers prevent this class of flaw

  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow protection, but the protection can be disabled by the programmer. Be wary that a language's interface to native code may still be subject to overflows, even if the language itself is theoretically safe.
  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. Examples include the Safe C String Library (SafeStr) by Messier and Viega, and the Strsafe.h library from Microsoft. These libraries provide safer versions of overflow-prone string-handling functions.
  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking. D3-SFCV (Stack Frame Canary Validation) from D3FEND discusses canary-based detection in detail.

More Out-of-bounds Write vulnerabilities (CWE-787)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Third-party and government advisories

Other vulnerabilities in imageCLASS MF644Cdw

All imageCLASS MF644Cdw vulnerabilities

Recent Out-of-bounds Write vulnerabilities

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