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.
Vulnerability category: Overflow
Products affected by CVE-2022-29223
- cpe:2.3:o:microsoft:azure_rtos_usbx:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-29223
0.30%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 69 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-29223
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
3.9
|
3.6
|
GitHub, Inc. |
CWE ids for CVE-2022-29223
-
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.Assigned by:
- nvd@nist.gov (Primary)
- security-advisories@github.com (Secondary)
References for CVE-2022-29223
-
https://github.com/azure-rtos/usbx/security/advisories/GHSA-2qc5-385m-x862
Potential buffer overflow on HUB descriptor · Advisory · azure-rtos/usbx · GitHubRelease Notes;Third Party Advisory
-
https://github.com/azure-rtos/usbx/releases/tag/v6.1.10_rel
Release Azure RTOS 6.1.10 · azure-rtos/usbx · GitHubRelease Notes;Third Party Advisory
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