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Timeprovider 4100 FirmwareOperating system · Microchip

CVE-2024-43685

CRITICAL · 9.8 CVSS v3.1 Published 2024-10-04
Fix available
A fix is available. Upgrade to 2.4.7 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Improper Authentication vulnerability in Microchip TimeProvider 4100 (login modules) allows Session Hijacking.This issue affects TimeProvider 4100: from 1.0 before 2.4.7.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Improper authentication in the login modules of Microchip TimeProvider 4100 allows attackers to hijack user sessions. This critical flaw (CVSS 9.8) affects versions 1.0 through versions before 2.4.7, enabling unauthenticated or authenticated attackers to steal active sessions and gain unauthorized access to the device.

MitigationUpgrade TimeProvider 4100 firmware to version 2.4.7 or later. Review active sessions and consider invalidating existing sessions after applying the patch.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Timeprovider 4100 FirmwareOperating system
Affected:>= 1.0, < 2.4.7

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the installed firmware version
    Access the TimeProvider 4100 web interface or CLI and navigate to the System Information or Firmware Version page. Common CLI command: 'show system info' or 'show version'.
    Affected if The displayed firmware version is 1.0 through any version before 2.4.7 (for example, 1.2, 2.0, 2.3, 2.4.0, 2.4.5).
  2. Verify the device is running an affected version
    Compare the identified firmware version against the vulnerable range: >= 1.0 and < 2.4.7. Check the exact version number string shown in the system information.
    Affected if The exact version falls within 1.0 <= version < 2.4.7.
  3. Confirm login or management interface accessibility
    Verify that the HTTP/HTTPS web management interface or CLI login prompt is reachable on the device network. This can be done by attempting to access the device IP or checking network access lists.
    Affected if The login interface is accessible from any network segment where attackers could reach the device.
  4. Review active sessions on the device
    If available, check the device session management interface or use CLI commands such as 'show session' or 'show users' to view currently established sessions.
    Affected if Any active sessions exist on the device, indicating the vulnerability could be exploited to hijack them.

The system is affected if the TimeProvider 4100 firmware version is 1.0 or higher but lower than 2.4.7, and the login/management interface is network-accessible.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2.4.7 or later
Fixed in 2.4.7
Interim mitigation

Upgrade TimeProvider 4100 firmware to version 2.4.7 or later. Review active sessions and consider invalidating existing sessions after applying the patch.

Recommended fix High confidence

Firmware version 2.4.7

  1. Verify the current firmware version of the TimeProvider 4100 by accessing the device management interface or checking system information
  2. Download the firmware version 2.4.7 or later from the official Microchip support portal (www.microchip.com)
  3. Review the firmware upgrade instructions in the Microchip TimeProvider 4100 documentation
  4. Schedule a maintenance window to perform the firmware upgrade, ensuring minimal impact to time synchronization services
  5. Back up the current device configuration before initiating the upgrade
  6. Upload the firmware file through the device web interface or management console
  7. Confirm the upgrade completes successfully and verify the new firmware version is 2.4.7 or later
  8. Test that authentication and session management functionality operates correctly
Caveat Review Microchip release notes for version 2.4.7 to check for any configuration or feature changes that may affect existing deployments

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Timeprovider 4100 Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing3.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,390
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-43685 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data