What’s Vulnerable › Vulnerabilities

CVE-2024-47943: Improper signature verification of firmware upgrade files

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-10-15 · updated 2026-06-17
• Weakness: CWE-347

Description

The firmware upgrade function in the admin web interface of the Rittal IoT Interface & CMC III Processing Unit devices checks if the patch files are signed before executing the containing run.sh script. The signing process is kind of an HMAC with a long string as key which is hard-coded in the firmware and is freely available for download. This allows crafting malicious "signed" .patch files in order to compromise the device and execute arbitrary code.

Affected products

• RITTAL GmbH & Co. KG IoT Interface & CMC III Processing Unit: before 6.21.00.2

References

• https://r.sec-consult.com/rittaliot
• https://www.rittal.com/de-de/products/deep/3124300
• http://seclists.org/fulldisclosure/2024/Oct/4

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