CyberSecBulletin
CVE-2023-3710NVD status: Modified

PM23/43: Improper Neutralization of Special Elements used in a Command

Published Updated By the CyberSecBulletin desk

CVE-2023-3710 is a critical-severity improper neutralization of special elements used in a command vulnerability in PM23/43 from Honeywell, 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. The record lists version P10.19.050004 as the first without the flaw, so updating PM23/43 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 49% chance of exploitation within 30 days, which is in the top 1.1% of all scored CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Update PM23/43 to P10.19.050004 or a later version.
  2. Update PC23/43, PD43 to K10.19.050004 or a later version.
  3. Update PM42 to T10.19.050004 or L10.19.050004, whichever matches your release line, or a later version.
  4. 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
HoneywellPM23/43before P10.19.050004P10.19.050004
HoneywellPC23/43, PD43before K10.19.050004K10.19.050004
HoneywellPM42before T10.19.050004; before L10.19.050004T10.19.050004, L10.19.050004
HoneywellPX4ie/6iebefore A10.19.050004A10.19.050004
HoneywellPX45/65before B10.19.050004B10.19.050004
HoneywellPD45, PX240before F10.19.050004F10.19.050004
HoneywellPX940before H10.19.050004H10.19.050004
HoneywellPM45before J10.19.050004J10.19.050004
HoneywellRP2f/RP4fbefore M10.19.050006M10.19.050006
Honeywellpc23_43before K10.19.050004K10.19.050004
Honeywellpd43before K10.19.050004K10.19.050004
Honeywellpx45before F10.19.050004F10.19.050004
Honeywellpx240before F10.19.050004F10.19.050004
HoneywellPm43 Firmwarebefore p10.19.050004p10.19.050004

Version data comes from the organisation that assigned the CVE. 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 3.19.9CriticalCNA (honeywell.com)
CVSS 3.19.8CriticalNVD

Official description

Improper Input Validation vulnerability in Honeywell PM43 on 32 bit, ARM (Printer web page modules) allows Command Injection.This issue affects PM43 versions prior to P10.19.050004. Update to the latest available firmware version of the respective printers to version MR19.5 (e.g. P10.19.050006).

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

References

Other vulnerabilities in PM23/43

All PM23/43 vulnerabilities

Recent Improper Neutralization of Special Elements used in a Command vulnerabilities

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