What is CVE-2024-47943?

CVE-2024-47943 is a critical-severity vulnerability in Rittal Gmbh & Co. Kg Iot Interface Cmc Iii Processing Unit, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.8/10. Published 2024-10-15.

How severe is CVE-2024-47943?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Rittal Gmbh & Co. Kg Iot Interface Cmc Iii Processing Unit

CVE-2024-47943

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.

EPSS: 0.006 (46.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Rittal Gmbh & Co. Kg Iot Interface Cmc Iii Processing Unit — versions <6.21.00.2

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

551230f0-3615-47bd-b7cc-93e92e730bbf (third-party-advisory)
551230f0-3615-47bd-b7cc-93e92e730bbf (patch)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2024-47943?: CVE-2024-47943 is a critical-severity vulnerability in Rittal Gmbh & Co. Kg Iot Interface Cmc Iii Processing Unit, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.8/10. Published 2024-10-15.
How severe is CVE-2024-47943?: Critical severity. CVSS v3 base score is 9.8 out of 10.