CVE-2022-36063: high-severity vulnerability in azure-rtos usbx
USBX Host CDC ECM integer underflow with buffer overflow
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.6epss 2.2%
Azure RTOS USBx is a USB host, device, and on-the-go (OTG) embedded stack, fully integrated with Azure RTOS ThreadX and available for all Azure RTOS ThreadX–supported processors. Azure RTOS USBX implementation of host support for USB CDC ECM includes an integer underflow and a buffer overflow in the `_ux_host_class_cdc_ecm_mac_address_get` function which may be potentially exploited to achieve remote code execution or denial of service. Setting mac address string descriptor length to a `0` or `1` allows an attacker to introduce an integer underflow followed (string_length) by a buffer overflow of the `cdc_ecm -> ux_host_class_cdc_ecm_node_id` array. This may allow one to redirect the code execution flow or introduce a denial of service. The fix has been included in USBX release [6.1.12](https://github.com/azure-rtos/usbx/releases/tag/v6.1.12_rel). Improved mac address string descriptor length validation to check for unexpectedly small values may be used as a workaround.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Affected products
azure-rtos · usbxRelated CVEs — azure-rtos usbx
In the same product, most dangerous first.
CVE-2022-39344CRITICALAzure RTOS USBX vulnerable to buffer overflow EPSS 2.7%CVE-2022-29246CRITICALPotential buffer overflow in function DFU upload in Azure RTOS USBXEPSS 2.4%CVE-2023-48694MEDIUMAzure RTOS USBX Remote Code Execution VulnerabilityEPSS 1.3%CVE-2022-29223HIGHBuffer overflow on HUB descriptor in Azure RTOS USBXEPSS 1.2%CVE-2023-48695HIGHAzure RTOS USBX Remote Code Execution VulnerabilityEPSS 1.2%CVE-2023-48697MEDIUMAzure RTOS USBX Remote Code Execution VulnerabilityEPSS 1.2%