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Vigil@nce - Linux kernel: information disclosure via media_enum_entities

June 2014 by Vigil@nce

This bulletin was written by Vigil@nce : http://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

A local attacker can use the ioctl of the media_enum_entities()
function of the Linux kernel, in order to read memory fragments,
which may obtain sensitive information.

Impacted products: Linux

Severity: 1/4

Creation date: 10/06/2014

DESCRIPTION OF THE VULNERABILITY

The media driver of the Linux kernel supports multimedia devices.

The media_device_enum_entities() function of the
drivers/media/media-device.c file lists devices. However, the
media_entity_desc structure is not initialized, before being
returned to the user space.

A local attacker can therefore use the ioctl for the
media_enum_entities() function of the Linux kernel, in order to
read memory fragments, which may obtain sensitive information.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Linux-kernel-information-disclosure-via-media-enum-entities-14850


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