Bug 1833452 (CVE-2020-11609) - CVE-2020-11609 kernel: NULL pointer dereference due to incorrect handling of invalid descriptors in stv06xx subsystem
Summary: CVE-2020-11609 kernel: NULL pointer dereference due to incorrect handling of ...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-11609
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1833453 1835664 1835665 1835667 1835668 1835669
Blocks: 1833454
TreeView+ depends on / blocked
 
Reported: 2020-05-08 17:14 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-12-15 11:18 UTC (History)
44 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in the way the stv06xx driver in the Linux kernel handled certain types of USB descriptors. This flaw allows an attacker with the ability to induce the error conditions to crash the system.
Clone Of:
Environment:
Last Closed: 2021-12-15 11:18:02 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2020-05-08 17:14:44 UTC 
An issue was discovered in the stv06xx subsystem in the Linux kernel before 5.6.1. drivers/media/usb/gspca/stv06xx/stv06xx.c and drivers/media/usb/gspca/stv06xx/stv06xx_pb0100.c mishandle invalid descriptors, as demonstrated by a NULL pointer dereference.

Reference and upstream commit:
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.1
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=485b06aadb933190f4bc44e006076bc27a23f205
Comment 1 Guilherme de Almeida Suckevicz 2020-05-08 17:15:58 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1833453]
Comment 2 Justin M. Forbes 2020-05-11 14:19:01 UTC 
This was fixed for Fedora with the 5.5.14 stable kernel update.
Comment 3 Petr Matousek 2020-05-14 09:56:28 UTC 
Mitigation:

In order to mitigate this issue it is possible to prevent the affected code from being loaded by blacklisting the kernel module gspca_stv06xx. For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278 .
Comment 4 Petr Matousek 2020-05-14 09:57:43 UTC 
Statement:

This issue is rated as having Low impact because of the preconditions needed to trigger the issue (physical access).
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