Bug 1743560 (CVE-2019-15099)

Summary: CVE-2019-15099 kernel: a NULL pointer dereference in drivers/net/wireless/ath/ath10k/usb.c leads to a crash
Product: [Other] Security Response Reporter: Marian Rehak <mrehak>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: acaringi, airlied, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jschorr, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, steved, williams, wmealing, yozone
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 null pointer dereference flaw was discovered in the Linux kernel's implementation of the ath10k USB device driver. The vulnerability requires the attacker to plug in a specially crafted hardware device that present endpoint descriptors that normal ath10k devices do not recognize. System availability is the highest threat with this vulnerability.
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-04-16 16:31:52 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: 1783849, 1783850, 1783851, 1783852, 1783853    
Bug Blocks: 1743561    

Description Marian Rehak 2019-08-20 08:28:23 UTC
A flaw in the Linux kernels implementation of the ath10k USB device driver could allow an attacker with the ability to plug in custom-crafted hardware to create a null pointer dereference via an incomplete address in an endpoint descriptor.

This will crash the system.

Upstream Patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bfd6e6e6c5d2ee43a3d9902b36e01fc7527ebb27

Comment 4 Wade Mealing 2019-12-16 05:16:26 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1783849]

Comment 6 Justin M. Forbes 2019-12-16 17:24:06 UTC
This was fixed for Fedora in the 5.3.14 stable kernel updates.

Comment 8 Eric Christensen 2020-01-08 14:10:50 UTC
Mitigation:

As the ath10k module will be auto-loaded when required, its use can be disabled by preventing the module from loading using the following instructions.

On the command line, as root, execute the following command:
# echo "install ath10k_usb /bin/true" >> /etc/modprobe.d/disable-ath10k_usb.conf 
 
The system will need to be restarted if the ath10k_usb module are loaded. In most circumstances, the kernel modules will be unable to be unloaded while the ath10k WiFi network interface 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.

Comment 9 errata-xmlrpc 2020-04-16 14:38:36 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:1493 https://access.redhat.com/errata/RHSA-2020:1493

Comment 10 Product Security DevOps Team 2020-04-16 16:31:52 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-15099

Comment 11 errata-xmlrpc 2020-04-28 15:24:58 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:1567 https://access.redhat.com/errata/RHSA-2020:1567

Comment 12 errata-xmlrpc 2020-04-28 15:51:23 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:1769 https://access.redhat.com/errata/RHSA-2020:1769