CyberSecBulletin
CVE-2024-12647NVD status: Analyzed

Satera MF656Cdw: Out-of-bounds Write

Published Updated By the CyberSecBulletin desk

CVE-2024-12647 is a critical-severity out-of-bounds write vulnerability in Satera MF656Cdw from Canon, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Satera MF656Cdw versions: 05.04 and earlier. 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.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Check which version of Satera MF656Cdw you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on canon.jp for workarounds and exact fixed builds.
  3. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
CanonSatera MF656Cdw05.04 and earlierNot stated
CanonSatera MF654Cdw05.04 and earlierNot stated
CanonColor imageCLASS MF656Cdw05.04 and earlierNot stated
CanonColor imageCLASS MF654Cdw05.04 and earlierNot stated
CanonColor imageCLASS MF653Cdw05.04 and earlierNot stated
CanonColor imageCLASS MF652Cdw05.04 and earlierNot stated
CanonColor imageCLASS LBP633Cdw05.04 and earlierNot stated
CanonColor imageCLASS LBP632Cdw05.04 and earlierNot stated
Canoni-SENSYS MF657Cdw05.04 and earlierNot stated
Canoni-SENSYS MF655Cdw05.04 and earlierNot stated
Canoni-SENSYS MF651Cdw05.04 and earlierNot stated
Canoni-SENSYS LBP633Cdw05.04 and earlierNot stated
Canoni-SENSYS LBP631Cdw05.04 and earlierNot stated
CanonMf455dw Firmware05.04 and earlierNot stated
CanonMf453dw Firmware05.04 and earlierNot stated
CanonMf452dw Firmware05.04 and earlierNot stated
CanonMf451dw Firmware05.04 and earlierNot stated
CanonMf465dw Firmware05.04 and earlierNot stated
CanonMf462dw Firmware05.04 and earlierNot stated
CanonMf656cdw Firmware05.04 and earlierNot stated
CanonMf654cdw Firmware05.04 and earlierNot stated
CanonMf653cdw Firmware05.04 and earlierNot stated
CanonMf652cw Firmware05.04 and earlierNot stated
CanonMf1238 Ii Firmware05.04 and earlierNot stated
CanonMf1440 Firmware05.04 and earlierNot stated

Version data comes from the organisation that assigned the CVE; 10 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA.

Official description

Buffer overflow in CPCA font download processing of Small Office Multifunction Printers and Laser Printers(*) which may allow an attacker on the network segment to trigger the affected product being unresponsive or to execute arbitrary code. *: Satera MF656Cdw/Satera MF654Cdw firmware v05.04 and earlier sold in Japan. Color imageCLASS MF656Cdw/Color imageCLASS MF654Cdw/Color imageCLASS MF653Cdw/Color imageCLASS MF652Cdw/Color imageCLASS LBP633Cdw/Color imageCLASS LBP632Cdw firmware v05.04 and earlier sold in US. i-SENSYS MF657Cdw/i-SENSYS MF655Cdw/i-SENSYS MF651Cdw/i-SENSYS LBP633Cdw/i-SENSYS LBP631Cdw firmware v05.04 and earlier sold in Europe.

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: yes, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Satera MF656Cdw

All Satera MF656Cdw vulnerabilities

Recent Out-of-bounds Write vulnerabilities

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