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weakness CVE-2014-0206

Linux kernel: information disclosure via aio_read_events_ring

Synthesis of the vulnerability

A local attacker can read a memory fragment via aio_read_events_ring() of the Linux kernel, in order to obtain sensitive information.
Severity of this announce: 1/4.
Creation date: 25/06/2014.
Références of this computer vulnerability: CERTFR-2014-AVI-373, CVE-2014-0206, FEDORA-2014-7863, FEDORA-2014-8487, openSUSE-SU-2014:1677-1, RHSA-2014:0786-01, RHSA-2014:0913-01, USN-2336-1, USN-2337-1, VIGILANCE-VUL-14935.
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Description of the vulnerability

The Linux kernel implements an AIO (Asynchronous IO) filesystem.

However, the aio_read_events_ring() function of the fs/aio.c file does not initialize a memory area before returning it to the user.

A local attacker can therefore read a memory fragment via aio_read_events_ring() of the Linux kernel, in order to obtain sensitive information.
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This vulnerability announce impacts software or systems such as Fedora, Android OS, Linux, openSUSE, RHEL, Ubuntu.

Our Vigil@nce team determined that the severity of this cybersecurity threat is low.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this computer threat bulletin.

Solutions for this threat

Linux kernel: version 3.15.3.
The version 3.15.3 is fixed:
  https://www.kernel.org/pub/linux/kernel/v3.x/

Linux kernel: version 3.14.10.
The version 3.14.10 is fixed:
  https://www.kernel.org/pub/linux/kernel/v3.x/

Linux kernel: version 3.12.24.
The version 3.12.24 is fixed:
  https://www.kernel.org/pub/linux/kernel/v3.x/

Linux kernel: version 3.10.46.
The version 3.10.46 is fixed:
  https://www.kernel.org/pub/linux/kernel/v3.x/

Linux kernel: patch for aio_read_events_ring.
A patch is available in information sources.

Android OS: patch 2017-04-01 and 2017-04-05.
A patch is indicated in information sources.

Fedora 19: new kernel packages.
New packages are available:
  Fedora 19: kernel 3.14.13-100.fc19

Fedora 20: new kernel packages.
New packages are available:
  Fedora 20: kernel 3.14.9-200.fc20

openSUSE 13.1: new kernel packages (22/12/2014).
New packages are available:
  openSUSE 13.1: kernel 3.11.10-25.1

RHEL 7: new kernel packages.
New packages are available:
  RHEL 7: kernel 3.10.0-123.4.2.el7

RHEL MRG: new kernel-rt packages.
New packages are available:
  RHEL 6: kernel-rt 3.10.33-rt32.43.el6rt

Ubuntu 12.04: new linux-image-3.13.0-35-generic packages.
New packages are available:
  Ubuntu 12.04 LTS: linux-image-3.13.0-35-generic 3.13.0-35.62~precise1

Ubuntu 14.04: new linux-image-3.13.0-35-generic packages.
New packages are available:
  Ubuntu 14.04 LTS: linux-image-3.13.0-35-generic 3.13.0-35.62
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