Bug 1745530 (CVE-2019-15218) - CVE-2019-15218 kernel: null pointer dereference in the drivers/media/usb/siano/smsusb.c driver
Summary: CVE-2019-15218 kernel: null pointer dereference in the drivers/media/usb/sian...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-15218
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: 1745531 1790713 1790714 1790715 1790716 1790717 1790718
Blocks: 1745541
TreeView+ depends on / blocked
 
Reported: 2019-08-26 10:30 UTC by Dhananjay Arunesh
Modified: 2021-10-25 09:53 UTC (History)
41 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel's Siano Mobile Silicon MDTV receiver driver. An attacker, with physical access and a specially crafted USB device, can exploit this vulnerability, creating a NULL pointer dereference and causing the system to crash. The highest threat from this vulnerability is system availability.
Clone Of:
Environment:
Last Closed: 2021-10-25 09:53:03 UTC
Embargoed:

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Description Dhananjay Arunesh 2019-08-26 10:30:59 UTC 
A vulnerability was found in the Linux kernels driver for Siano Mobile Silicon, 
MDTV receiver. An attacker with physical access with a crafted USB device can exploit assumptions made in the driver to create a NULL pointer dereference.  


Reference:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=31e0456de5be379b10fea0fa94a681057114a96e
https://syzkaller.appspot.com/bug?id=4a5d7c8c2b6dbedb5b7218c6d7e8666bd2387517
Comment 1 Dhananjay Arunesh 2019-08-26 10:31:17 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1745531]
Comment 2 Justin M. Forbes 2019-08-26 13:16:59 UTC 
This was fixed for Fedora with the 5.1.8 stable kernel update.
Comment 9 Eric Christensen 2020-01-20 12:41:39 UTC 
Mitigation:

As the smsusb module will be auto-loaded when required, its use can be disabled by preventing the module from loading with the following instructions:

# echo "install smsusb /bin/true" >> /etc/modprobe.d/disable-smsusb.conf 
 
The system will need to be restarted if the module are already loaded. In most circumstances, the smsusb kernel modules will be unable to be unloaded while the adapter is in use. If the system requires this module to work correctly, this mitigation may not be suitable.

If you need further assistance, see KCS article https://access.redhat.com/solutions/41278 or contact Red Hat Global Support Services."
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