Rapid7 Vulnerability & Exploit Database

Red Hat: CVE-2017-18344: Important: kernel-alt security, bug fix, and enhancement update (Multiple Advisories)

Back to Search

Red Hat: CVE-2017-18344: Important: kernel-alt security, bug fix, and enhancement update (Multiple Advisories)

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
07/26/2018
Created
03/19/2019
Added
10/31/2018
Modified
03/03/2021

Description

The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;