CyberSecBulletin
CVE-2023-6232NVD status: Modified

Satera LBP670C Series: Out-of-bounds Write

Published Updated By the CyberSecBulletin desk

CVE-2023-6232 is a critical-severity out-of-bounds write vulnerability in Satera LBP670C Series 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 LBP670C Series versions: 03.07 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 1.46% chance of exploitation within 30 days, higher than 74% of scored CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Check which version of Satera LBP670C Series 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 LBP670C Series03.07 and earlierNot stated
CanonSatera MF750C Series03.07 and earlierNot stated
CanonColor imageCLASS LBP674C03.07 and earlierNot stated
CanonColor imageCLASS X LBP1333C03.07 and earlierNot stated
CanonColor imageCLASS MF750C Series03.07 and earlierNot stated
CanonColor imageCLASS X MF1333C Series03.07 and earlierNot stated
Canoni-SENSYS LBP673Cdw03.07 and earlierNot stated
CanonC1333P03.07 and earlierNot stated
Canoni-SENSYS MF750C Series03.07 and earlierNot stated
CanonC1333i Series03.07 and earlierNot stated
CanonMf755cdw Firmware03.07 and earlierNot stated
CanonMf753cdw Firmware03.07 and earlierNot stated
CanonMf751cdw Firmware03.07 and earlierNot stated
CanonLbp674c Firmware03.07 and earlierNot stated
CanonLbp672c Firmware03.07 and earlierNot stated
CanonLbp671c Firmware03.07 and earlierNot stated
CanonMf1238 Ii Firmware03.07 and earlierNot stated
CanonMf1333c Firmware03.07 and earlierNot stated
CanonMf1643i Ii Firmware03.07 and earlierNot stated
CanonMf1643if Ii Firmware03.07 and earlierNot stated
CanonMf275dw Firmware03.07 and earlierNot stated
CanonMf273dw Firmware03.07 and earlierNot stated
CanonMf272dw Firmware03.07 and earlierNot stated
CanonMf455dw Firmware03.07 and earlierNot stated
CanonMf453dw Firmware03.07 and earlierNot stated

Version data comes from the organisation that assigned the CVE; 14 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 NVD.

Scoring systemScoreSeverityScored by
CVSS 3.19.8CriticalCNA
CVSS 3.19.8CriticalNVD

Official description

Buffer overflow in the Address Book username process in authentication of Mobile Device Function of 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 LBP670C Series/Satera MF750C Series firmware v03.07 and earlier sold in Japan. Color imageCLASS LBP674C/Color imageCLASS X LBP1333C/Color imageCLASS MF750C Series/Color imageCLASS X MF1333C Series firmware v03.07 and earlier sold in US. i-SENSYS LBP673Cdw/C1333P/i-SENSYS MF750C Series/C1333i Series firmware v03.07 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: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Satera LBP670C Series

All Satera LBP670C Series vulnerabilities

Recent Out-of-bounds Write vulnerabilities

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