Bug 1824792 (CVE-2020-11668) - CVE-2020-11668 kernel: mishandles invalid descriptors in drivers/media/usb/gspca/xirlink_cit.c
Summary: CVE-2020-11668 kernel: mishandles invalid descriptors in drivers/media/usb/gs...
Keywords:
Status: NEW
Alias: CVE-2020-11668
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1825410 1826877 1826879 1826880 1824793 1826878 1826881
Blocks: 1824795
TreeView+ depends on / blocked
 
Reported: 2020-04-16 13:01 UTC by Guilherme de Almeida Suckevicz
Modified: 2020-09-15 20:43 UTC (History)
44 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A NULL pointer dereference flaw was found in the Xirlink camera USB driver 'xirlink-cit' in the Linux kernel. The driver mishandles invalid descriptors leading to a denial-of-service (DoS). This could allow a local attacker with user privilege to crash the system or leak kernel internal information.
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Description Guilherme de Almeida Suckevicz 2020-04-16 13:01:40 UTC
A NULL pointer dereference flaw was found in the Xirlink camera USB driver 'xirlink-cit' in the Linux kernel. The driver mishandles invalid descriptors leading to a denial-of-service (DoS). This could allow a local attacker with user privilege to crash the system or leak kernel internal information.

Reference:
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.1

Upstream commit:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a246b4d547708f33ff4d4b9a7a5dbac741dc89d8

Comment 1 Guilherme de Almeida Suckevicz 2020-04-16 13:04:13 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1824793]

Comment 2 Justin M. Forbes 2020-04-16 13:35:55 UTC
This was fixed for Fedora with the 5.5.14 stable kernel updates.

Comment 11 Rohit Keshri 2020-04-27 17:01:11 UTC
Mitigation:

Mitigation for this issue is to skip loading the affected module 'xirlink-cit' onto the system till we have a fix available, this can be done by a blacklist mechanism, this will ensure the driver is not loaded at the boot time.
~~~
How do I blacklist a kernel module to prevent it from loading automatically?
https://access.redhat.com/solutions/41278 
~~~


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