Cyber Resilience

CVE-2024-43686

Medium

Published: 04 October 2024

Published
04 October 2024
Modified
16 October 2024
KEV Added
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Patch
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CVSS Score v4 5.4 CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:X/RE:X/U:Green
EPSS Score 0.1126 93.7th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-43686 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Microchip Timeprovider 4100 Firmware. Its CVSS base score is 5.4 (Medium).

Operationally, ranked in the top 6.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

Deeper analysis

CVE-2024-43686 is a reflected cross-site scripting vulnerability arising from improper neutralization of input during web page generation in the data plot modules of the Microchip TimeProvider 4100 grandmaster clock. The flaw affects versions 1.0 up to but not including 2.4.7 and carries a CVSS 4.0 score of 5.4.

An authenticated local user positioned on the same network segment can supply a crafted URL that, when clicked by another authenticated user, executes arbitrary script in the victim's browser session. Successful exploitation can lead to theft of session tokens or other sensitive data displayed within the device's web interface.

Microchip's advisory and the associated coordinated disclosure from Gruppo TIM both direct customers to upgrade to firmware version 2.4.7 or later; no work-arounds are documented.

The EPSS score for this CVE rose from a low baseline to a peak of 0.1411, indicating measurable post-disclosure exploitation interest.

EU & UK References

Vulnerability details

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Microchip TimeProvider 4100 (data plot modules) allows Reflected XSS.This issue affects TimeProvider 4100: from 1.0 before 2.4.7.

CWE(s)
CWE-79

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

microchip
timeprovider 4100 firmware
1.0 — 2.4.7

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering
addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

References