CyberSecBulletin
CVE-2022-35873NVD status: Modified

Ignition: Missing User Interaction for Potentially Unsafe Action

Published Updated By the CyberSecBulletin desk

CVE-2022-35873 is a high-severity missing user interaction for potentially unsafe action vulnerability in Ignition from Inductive Automation, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. Affected Ignition versions: 8.1.15 (b2022030114). The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.71% chance of exploitation within 30 days, higher than 54% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of Ignition you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on support.inductiveautomation.com for workarounds and exact fixed builds.
  3. Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.

Affected products and versions

VendorProductAffected versionsFixed in
Inductive AutomationIgnition8.1.15 (b2022030114)Not stated

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
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
RequiredA user must take an action such as opening a file or link.
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:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.17.8HighNVD
CVSS 3.07.8HighCNA (trendmicro.com)

Official description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Inductive Automation Ignition 8.1.15 (b2022030114). User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the processing of ZIP files. Crafted data in a ZIP file can cause the application to execute arbitrary Python scripts. The user interface fails to provide sufficient indication of the hazard. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-16949.

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

The underlying weakness: Missing User Interaction for Potentially Unsafe Action

The product encounters a situation in which some of its behavior is security-critical and should be authorized by a human before progressing, but it does not properly consult with the human user or its proxy (such as UI approval dialogues or pre-set policies) to determine whether it is allowed to perform the potentially dangerous behavior.

How developers prevent this class of flaw

  • Product systems should warn users that a potentially dangerous action may occur if the user proceeds. For example, if the user downloads a file from an unknown source and attempts to execute the file on their machine, then the application's GUI can indicate that the file is unsafe.

More Missing User Interaction for Potentially Unsafe Action vulnerabilities (CWE-356)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Third-party and government advisories

Other vulnerabilities in Ignition

All Ignition vulnerabilities

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