CyberSecBulletin
CVE-2022-45796NVD status: Modified

SHARP multifunction printers: Improper Neutralization of Special Elements used in a Command

Published Updated By the CyberSecBulletin desk

CVE-2022-45796 is a high-severity improper neutralization of special elements used in a command vulnerability in SHARP multifunction printers from Sharp, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. Affected SHARP multifunction printers versions: Digital Full-color Multifunctional System through 202; Digital Multifunctional System (Monochrome) through 200. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 3.27% chance of exploitation within 30 days, higher than 89% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of SHARP multifunction printers you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on global.sharp for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
SHARPSHARP multifunction printersDigital Full-color Multifunctional System through 202; Digital Multifunctional System (Monochrome) through 200Not stated
SharpBp-30c25 FirmwareNot specified in the recordNot stated
SharpBp-30c25t FirmwareNot specified in the recordNot stated
SharpBp-30c25y FirmwareNot specified in the recordNot stated
SharpBp-30c25z FirmwareNot specified in the recordNot stated
SharpBp-30m28 FirmwareNot specified in the recordNot stated
SharpBp-30m28t FirmwareNot specified in the recordNot stated
SharpBp-30m31 FirmwareNot specified in the recordNot stated
SharpBp-30m31t FirmwareNot specified in the recordNot stated
SharpBp-30m35 FirmwareNot specified in the recordNot stated
SharpBp-30m35t FirmwareNot specified in the recordNot stated
SharpBp-50c26 FirmwareNot specified in the recordNot stated
SharpBp-50c31 FirmwareNot specified in the recordNot stated
SharpBp-50c36 FirmwareNot specified in the recordNot stated
SharpBp-50c45 FirmwareNot specified in the recordNot stated
SharpBp-50c55 FirmwareNot specified in the recordNot stated
SharpBp-50c65 FirmwareNot specified in the recordNot stated
SharpBp-50m26 FirmwareNot specified in the recordNot stated
SharpBp-50m31 FirmwareNot specified in the recordNot stated
SharpBp-50m36 FirmwareNot specified in the recordNot stated
SharpBp-50m45 FirmwareNot specified in the recordNot stated
SharpBp-50m50 FirmwareNot specified in the recordNot stated
SharpBp-50m55 FirmwareNot specified in the recordNot stated
SharpBp-55c26 FirmwareNot specified in the recordNot stated
SharpBp-60c31 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
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
HighAdministrator-level access is required first.
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:H/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.19.1CriticalCNA (zuso.ai)
CVSS 3.17.2HighNVD

Official description

Command injection vulnerability in nw_interface.html in SHARP multifunction printers (MFPs)'s Digital Full-color Multifunctional System 202 or earlier, 120 or earlier, 600 or earlier, 121 or earlier, 500 or earlier, 402 or earlier, 790 or earlier, and Digital Multifunctional System (Monochrome) 200 or earlier, 211 or earlier, 102 or earlier, 453 or earlier, 400 or earlier, 202 or earlier, 602 or earlier, 500 or earlier, 401 or earlier allows remote attackers to execute arbitrary commands via unspecified vectors.

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

The underlying weakness: Improper Neutralization of Special Elements used in a Command

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

How developers prevent this class of flaw

  • If at all possible, use library calls rather than external processes to recreate the desired functionality.
  • If possible, ensure that all external commands called from the program are statically created.
  • Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.

More Improper Neutralization of Special Elements used in a Command vulnerabilities (CWE-77)

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

Recent Improper Neutralization of Special Elements used in a Command vulnerabilities

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