Actu
Vigil@nce - Linux kernel: buffer overflow via hiddev
August 2016 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can generate a buffer overflow via the device driver
hiddev from the Linux kernel, in order to trigger a denial of
service, and possibly to run code.
Impacted products: Debian, Fedora, Linux, openSUSE, openSUSE Leap,
SUSE Linux Enterprise Desktop, SLES.
Severity: 2/4.
Creation date: 28/06/2016.
DESCRIPTION OF THE VULNERABILITY
The Linux kernel includes a device driver "hiddev" which manages
the commands named HIDIOCGUSAGES and HIDIOCSUSAGES.
When a userspace program call ioctl with one of these commands,
the array uref_multi->values is filled in from the array
field->value. However, some bound checks are missing and the
caller can make the loop continue writing after the buffer.
An attacker can therefore generate a buffer overflow via the
device driver hiddev from the Linux kernel, in order to trigger a
denial of service, and possibly to run code.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/Linux-kernel-buffer-overflow-via-hiddev-19987
