Bug 1745530 (CVE-2019-15218)

Summary: CVE-2019-15218 kernel: null pointer dereference in the drivers/media/usb/siano/smsusb.c driver
Product: [Other] Security Response Reporter: Dhananjay Arunesh <darunesh>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: acaringi, airlied, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mcressma, mjg59, mlangsdo, nmurray, rt-maint, rvrbovsk, steved, williams, wmealing
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
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.
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-10-25 09:53:03 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1745531, 1790713, 1790714, 1790715, 1790716, 1790717, 1790718    
Bug Blocks: 1745541    

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."