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Vulnerability of Linux kernel: information disclosure via perf_event_open

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via perf_event_open() of the Linux kernel, in order to obtain sensitive information.
Impacted products: Debian, RHEL.
Severity of this bulletin: 1/4.
Creation date: 28/05/2019.
Références of this threat: 1701245, CERTFR-2020-AVI-180, CVE-2019-3901, DLA-1799-1, DLA-1799-2, RHSA-2020:1016-01, RHSA-2020:1070-01, VIGILANCE-VUL-29427.

Description of the vulnerability 

An attacker can bypass access restrictions to data via perf_event_open() of the Linux kernel, in order to obtain sensitive information.
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This computer vulnerability alert impacts software or systems such as Debian, RHEL.

Our Vigil@nce team determined that the severity of this computer threat alert 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 security vulnerability.

Solutions for this threat 

Debian 8: new linux packages.
New packages are available:
  Debian 8: linux 3.16.68-1

RHEL 7: new kernel packages (01/04/2020).
New packages are available:
  RHEL 7.0-7.7: kernel 3.10.0-1127.el7

RHEL 7: new kernel-rt packages (01/04/2020).
New packages are available:
  RHEL 7.0-7.7: kernel-rt 3.10.0-1127.rt56.1093.el7
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