CyberSecBulletin
CVE-2024-7987NVD status: Analyzed

ThinManager® ThinServer™: Unrestricted Upload of File with Dangerous Type

Published Updated By the CyberSecBulletin desk

CVE-2024-7987 is a high-severity unrestricted upload of file with dangerous type vulnerability in ThinManager® ThinServer™ from Rockwell 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 attacker with a low-privileged account, without any action from a user. Affected ThinManager® ThinServer™ versions: 11.1.0 through 11.1.7; 11.2.0 through 11.2.8; 12.0.0 through 12.0.6, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.32% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of ThinManager® ThinServer™ you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on rockwellautomation.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
Rockwell AutomationThinManager® ThinServer™11.1.0 through 11.1.7; 11.2.0 through 11.2.8; 12.0.0 through 12.0.6; 12.1.0 through 12.1.7; 13.0.0 through 13.0.4; 13.1.0 through 13.1.2; 13.2.0 through 13.2.1Not 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
LowA basic user account is enough.
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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 4.08.5HighCNA (rockwellautomation.com)
CVSS 3.17.8HighNVD

Official description

A remote code execution vulnerability exists in the Rockwell Automation ThinManager® ThinServer™ that allows a threat actor to execute arbitrary code with System privileges. To exploit this vulnerability and a threat actor must abuse the ThinServer™ service by creating a junction and use it to upload arbitrary files.

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

The underlying weakness: Unrestricted Upload of File with Dangerous Type

The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

How developers prevent this class of flaw

  • Generate a new, unique filename for an uploaded file instead of using the user-supplied filename, so that no external input is used at all.
  • When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
  • Consider storing the uploaded files outside of the web document root entirely. Then, use other mechanisms to deliver the files dynamically.

More Unrestricted Upload of File with Dangerous Type vulnerabilities (CWE-434)

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 ThinManager® ThinServer™

All ThinManager® ThinServer™ vulnerabilities

Recent Unrestricted Upload of File with Dangerous Type vulnerabilities

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