Paper/Archive/CVE-2024-47943

CVE-2024-47943

RITTAL GmbH & Co. KG IoT Interface & CMC III Processing Unit — Improper signature verification of firmware upgrade files

EPSS 0.6%public exploit CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (ADP)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 50.5.505 × 2010.1 Exploit: SSVC poc+1010.0 SSVC exploitation: poc+100.0

Description · from the CVE record

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

ProductAffectedFixed inSource

IoT Interface & CMC III Processing Unit<6.21.00.2–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

writeupr.sec-consult.com/rittaliot patchrittal.com/de-de/products/deep/3124300 refseclists.org/fulldisclosure/2024/Oct/4