Vulnerability Details CVE-2022-29223
Azure RTOS USBX is a USB host, device, and on-the-go (OTG) embedded stack. In versions prior to 6.1.10, an attacker can cause a buffer overflow by providing the Azure RTOS USBX host stack a HUB descriptor with `bNbPorts` set to a value greater than `UX_MAX_TT` which defaults to 8. For a `bNbPorts` value of 255, the implementation of `ux_host_class_hub_descriptor_get` function will modify the contents of `hub` -> `ux_host_class_hub_device` -> `ux_device_hub_tt` array violating the end boundary by 255 - `UX_MAX_TT` items. The USB host stack needs to validate the number of ports reported by the hub, and if the value is larger than UX_MAX_TT, USB stack needs to reject the request. This fix has been included in USBX release 6.1.10.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.054
EPSS Ranking 89.6%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 7.5
References
Products affected by CVE-2022-29223
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cpe:2.3:o:microsoft:azure_rtos_usbx:6.0
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cpe:2.3:o:microsoft:azure_rtos_usbx:6.0.1
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cpe:2.3:o:microsoft:azure_rtos_usbx:6.0.2
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cpe:2.3:o:microsoft:azure_rtos_usbx:6.1
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cpe:2.3:o:microsoft:azure_rtos_usbx:6.1.2
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cpe:2.3:o:microsoft:azure_rtos_usbx:6.1.3
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cpe:2.3:o:microsoft:azure_rtos_usbx:6.1.4
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cpe:2.3:o:microsoft:azure_rtos_usbx:6.1.5
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cpe:2.3:o:microsoft:azure_rtos_usbx:6.1.6
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cpe:2.3:o:microsoft:azure_rtos_usbx:6.1.7
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cpe:2.3:o:microsoft:azure_rtos_usbx:6.1.8
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cpe:2.3:o:microsoft:azure_rtos_usbx:6.1.9