Bug 1731000 (CVE-2019-13631) - CVE-2019-13631 kernel: OOB writes in parse_hid_report_descriptor in drivers/input/tablet/gtco.c
Summary: CVE-2019-13631 kernel: OOB writes in parse_hid_report_descriptor in drivers/i...
Keywords:
Status: NEW
Alias: CVE-2019-13631
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: 1731814 1731815 1731816 1731817 1731818 1731001
Blocks: 1731002
TreeView+ depends on / blocked
 
Reported: 2019-07-18 06:24 UTC by Dhananjay Arunesh
Modified: 2019-09-29 15:17 UTC (History)
44 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in the Linux kernel's implementation of GTCO tablet/digitizer's version of the parse_hid_report_descriptor in drivers. An attacker with local access could use this flaw to create a specially crafted USB device inserted into the host to corrupt memory, trigger an out-of-bounds write during the generation of debugging messages, or possibly escalate the privileges of a process.
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Description Dhananjay Arunesh 2019-07-18 06:24:21 UTC
A vulnerability was discovered in the linux kernels implementation of "GTCO tablet/digitizer"s version of parse_hid_report_descriptor in drivers.

An attacker with local access could create a malicious USB device which must be inserted into the local usb port to send a crafted USB response that triggers an out-of-bounds write during generation of debugging messages.

It is unlikely that this attack is effective or wide-spread as it requires specific usb hardware and physical access to the hardware to exploit.

Reference:
https://patchwork.kernel.org/patch/11040813/

Comment 1 Dhananjay Arunesh 2019-07-18 06:24:42 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1731001]

Comment 3 Wade Mealing 2019-07-22 06:47:13 UTC
Mitigation:

It is possible to prevent the kernel from loading the affected code by blacklisting the gtco kernel module. Visit https://access.redhat.com/solutions/41278  for specifics.

Comment 5 Wade Mealing 2019-07-22 07:17:32 UTC
This flaw is rated as moderate, it is unlikely that this attack vector will be frequently used by attackers to the complexity of physical access and creating a usb device that creates specific USB responses.


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