Oracle Linux: CVE-2024-41035: ELSA-2024-12610: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)

Oracle Linux: CVE-2024-41035: ELSA-2024-12610: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)

Severity

5

CVSS

(AV:L/AC:L/Au:S/C:N/I:N/A:C)

Published

07/29/2024

Created

10/18/2024

Added

10/16/2024

Modified

01/23/2025

Description

In the Linux kernel, the following vulnerability has been resolved: USB: core: Fix duplicate endpoint bug by clearing reserved bits in the descriptor Syzbot has identified a bug in usbcore (see the Closes: tag below) caused by our assumption that the reserved bits in an endpoint descriptor's bEndpointAddress field will always be 0.As a result of the bug, the endpoint_is_duplicate() routine in config.c (and possibly other routines as well) may believe that two descriptors are for distinct endpoints, even though they have the same direction and endpoint number.This can lead to confusion, including the bug identified by syzbot (two descriptors with matching endpoint numbers and directions, where one was interrupt and the other was bulk). To fix the bug, we will clear the reserved bits in bEndpointAddress when we parse the descriptor.(Note that both the USB-2.0 and USB-3.1 specs say these bits are "Reserved, reset to zero".)This requires us to make a copy of the descriptor earlier in usb_parse_endpoint() and use the copy instead of the original when checking for duplicates. A vulnerability was found in the usb_parse_endpoint() function in the Linux kernel's usb drivers, where improper handling of the reserved bits in an endpoint descriptor's bEndpointAddress field can lead to confusion in the endpoint_is_duplicate() routine in config.c. This will erroneously treat the same endpoint descriptors as distinct, given that the reserved bits are not properly cleared. This can potentially lead to unexpected behavior from connected USB devices.

Solution(s)

• oracle-linux-upgrade-kernel
• oracle-linux-upgrade-kernel-uek

References

• https://attackerkb.com/topics/cve-2024-41035
• CVE - 2024-41035
• ELSA-2024-12610
• ELSA-2024-12618
• ELSA-2024-12779
• ELSA-2024-7000
• ELSA-2024-12612