Bug 1671343 (CVE-2017-18360) - CVE-2017-18360 kernel: Division by zero in change_port_settings in drivers/usb/serial/io_ti.c resulting in a denial of service
Summary: CVE-2017-18360 kernel: Division by zero in change_port_settings in drivers/us...
Status: NEW
Alias: CVE-2017-18360
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: impact=low,public=20170511,reported=2...
Keywords: Security
Depends On: 1540721 1553351 1671752 1671753 1671755
Blocks: 1671344
TreeView+ depends on / blocked
 
Reported: 2019-01-31 13:05 UTC by Andrej Nemec
Modified: 2019-05-07 10:14 UTC (History)
41 users (show)

(edit)
A division-by-zero in set_termios(), when debugging is enabled, was found in the Linux kernel. When the [io_ti] driver is loaded, a local unprivileged attacker can request incorrect high transfer speed in the change_port_settings() in the drivers/usb/serial/io_ti.c so that the divisor value becomes zero and causes a system crash resulting in a denial of service.
Clone Of:
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Last Closed:


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Description Andrej Nemec 2019-01-31 13:05:27 UTC
A division-by-zero in set_termios() when debugging is enabled was found in the Linux kernel. When [io_ti] driver is loaded a local unprivileged attacker can request incorrect high transfer speed in the change_port_settings() in the drivers/usb/serial/io_ti.c so that the divisor value becomes zero and causes a system crash and a denial-of-service.

References:

https://marc.info/?l=linux-usb&m=149449572020916&w=2

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6aeb75e6adfaed16e58780309613a578fe1ee90b


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