CVE-2024-47943

Improper signature verification of firmware upgrade files

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.

Remediation

Solution:

  • The vendor provides a patched version V6.21.00.2 which can be downloaded from the following URL:  www.rittal.com/de-de/products/deep/3124300 https://www.rittal.com/de-de/products/deep/3124300

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.14%
Third-Party Advisory sec-consult.com
Affected: RITTAL GmbH & Co. KG IoT Interface & CMC III Processing Unit
Published at:
Updated at:

References

Link Tags
https://r.sec-consult.com/rittaliot third party advisory
https://www.rittal.com/de-de/products/deep/3124300 patch

Frequently Asked Questions

What is the severity of CVE-2024-47943?
CVE-2024-47943 has been scored as a critical severity vulnerability.
How to fix CVE-2024-47943?
To fix CVE-2024-47943: The vendor provides a patched version V6.21.00.2 which can be downloaded from the following URL:  www.rittal.com/de-de/products/deep/3124300 https://www.rittal.com/de-de/products/deep/3124300
Is CVE-2024-47943 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-47943 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-47943?
CVE-2024-47943 affects RITTAL GmbH & Co. KG IoT Interface & CMC III Processing Unit.
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