Vulnerability · Published Oct 15, 2024 · Assigned by SEC-VLab
CVE-2024-47943Improper signature verification of firmware upgrade files
Critical 9.8
In plain English
A critical-severity security flaw in IoT Interface & CMC III Processing Unit from RITTAL GmbH & Co. KG. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities).
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| RITTAL GmbH & Co. KG | IoT Interface & CMC III Processing Unit | <6.21.00.2 |
Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H