CVE-2022-29223 Buffer overflow on HUB descriptor in Azure RTOS USBX
An attacker can trigger a buffer overflow in Azure RTOS USBX by providing a malicious HUB descriptor, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-29223?
CVE-2022-29223 is a high-severity memory corruption vulnerability in azure-rtos usbx, published on 24 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-120
Which versions are affected by CVE-2022-29223?
It affects 1 product.
Products include Eclipse Threadx Usbx.
How do I fix CVE-2022-29223?
No fix has been published for CVE-2022-29223 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-29223 being exploited?
There is no known exploitation of CVE-2022-29223 in the wild and no public exploit code.
Other vulnerabilities in azure-rtos usbx
- CVE-2022-29246 Potential buffer overflow in function DFU upload in Azure RTOS USBX
- CVE-2022-39293 Azure RTOS USBX Host PIMA vulnerable to read integer underflow with buffer overflow
- CVE-2022-36063 USBX Host CDC ECM integer underflow with buffer overflow
- CVE-2023-48695 Azure RTOS USBX Remote Code Execution Vulnerability
- CVE-2023-48694 Azure RTOS USBX Remote Code Execution Vulnerability
Sources
Also known as GHSA-2qc5-385m-x862.