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PatchSiren cyber security CVE debrief

CVE-2024-41988 TEM CVE debrief

TEM Opera Plus FM Family Transmitter firmware version 35.45 contains a critical unauthenticated file upload vulnerability. An exposed endpoint permits MPFS File System binary image uploads without authentication. The MPFS file system underpins the device's HTTP2 web server module and is also utilized by the SNMP module and other applications requiring basic read-only storage. Successful exploitation allows an attacker to overwrite flash program memory containing the web server's main interfaces, leading to arbitrary code execution. CISA published advisory ICSA-24-277-01 on October 3, 2024, documenting this vulnerability with a CVSS 3.1 score of 9.8 (Critical). TEM has not responded to CISA's coordination requests to develop mitigations.

Vendor
TEM
Product
Opera Plus FM Family Transmitter
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2024-10-03
Original CVE updated
2024-10-03
Advisory published
2024-10-03
Advisory updated
2024-10-03

Who should care

Organizations operating TEM Opera Plus FM Family Transmitters in broadcast infrastructure, particularly those with devices exposed to network access. Security teams responsible for OT/ICS environments, broadcast engineers, and critical infrastructure operators should prioritize assessment and network-level mitigations.

Technical summary

The TEM Opera Plus FM Family Transmitter exposes an unprotected endpoint that accepts MPFS (Microchip Proprietary File System) binary image uploads without requiring authentication. The MPFS file system serves as the foundation for the device's HTTP2 web server module and is also used by the SNMP module. Because this file system can be overwritten via the unauthenticated endpoint, an attacker can upload a malicious binary image that overwrites flash program memory. This enables modification of the web server's main interfaces and execution of arbitrary code on the device. The vulnerability affects firmware version 35.45. No vendor-provided patch is currently available.

Defensive priority

critical

Recommended defensive actions

  • Contact TEM directly for additional information regarding mitigation status and potential firmware updates
  • Restrict network access to affected transmitter devices at the network perimeter
  • Implement network segmentation to isolate affected devices from untrusted networks
  • Monitor for unauthorized access attempts to device management interfaces
  • Apply defense-in-depth strategies per CISA ICS recommended practices
  • Review and implement ICS-CERT cybersecurity best practices for industrial control systems

Evidence notes

Vulnerability description and affected product version (35.45) sourced from CISA CSAF advisory ICSA-24-277-01. CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H confirmed via source references. Vendor non-response to CISA coordination documented in remediation section of source advisory.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-41988 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-41988

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2024-41988 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-41988

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2024/icsa-24-277-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-277-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ncas/tips/ST04-014

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.