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

Quick assessment

Affected
RITTAL GmbH & Co. KG IoT Interface & CMC III Processing Unit
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rittal IoT Interface & CMC III Processing Unit是德国Rittal公司的一个用于监控物理环境条件的传感器智能联网的关键组件。 Rittal IoT Interface & CMC III Processing Unit 6.21.00.2之前版本存在安全漏洞，该漏洞源于固件升级功能未对补丁文件进行签名验证，攻击者可以制作恶意的签名.patch 文件，以破坏设备并执行任意代码。

AI Predicted 8.1 Difficulty: Easy EPSS 0.64% · P49
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I. Basic Information for CVE-2024-47943

Vulnerability Information
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Vulnerability Title
Improper signature verification of firmware upgrade files
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Rittal IoT Interface & CMC III Processing Unit 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rittal IoT Interface & CMC III Processing Unit是德国Rittal公司的一个用于监控物理环境条件的传感器智能联网的关键组件。 Rittal IoT Interface & CMC III Processing Unit 6.21.00.2之前版本存在安全漏洞，该漏洞源于固件升级功能未对补丁文件进行签名验证，攻击者可以制作恶意的签名.patch 文件，以破坏设备并执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
RITTAL GmbH & Co. KG IoT Interface & CMC III Processing Unit <6.21.00.2 -

II. Public POCs for CVE-2024-47943

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III. Intelligence Information for CVE-2024-47943

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Vendor Advisories for CVE-2024-47943 (1)

Same Patch Batch · RITTAL GmbH & Co. KG · 2024-10-15 · 3 CVEs total

CVE-2024-47944 Missing Protection Mechanism for Alternate Hardware Interface
CVE-2024-47945 Predictable Session ID

IV. Related Vulnerabilities

Same product: IoT Interface & CMC III Processing Unit
Same vendor: RITTAL GmbH & Co. KG
Same weakness: CWE-347

V. Comments for CVE-2024-47943

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