Rapid7 Vulnerability & Exploit Database

Ubuntu: (Multiple Advisories) (CVE-2017-18344): Linux kernel (Trusty HWE) regressions

Free InsightVM Trial No Credit Card Necessary
Watch Demo See how it all works
Back to Search

Ubuntu: (Multiple Advisories) (CVE-2017-18344): Linux kernel (Trusty HWE) regressions

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
07/26/2018
Created
03/19/2019
Added
08/21/2018
Modified
08/25/2021

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)

  • ubuntu-upgrade-linux-image-3-13-0-155-generic
  • ubuntu-upgrade-linux-image-3-13-0-155-generic-lpae
  • ubuntu-upgrade-linux-image-3-13-0-155-lowlatency
  • ubuntu-upgrade-linux-image-3-13-0-155-powerpc-e500
  • ubuntu-upgrade-linux-image-3-13-0-155-powerpc-e500mc
  • ubuntu-upgrade-linux-image-3-13-0-155-powerpc-smp
  • ubuntu-upgrade-linux-image-3-13-0-155-powerpc64-emb
  • ubuntu-upgrade-linux-image-3-13-0-155-powerpc64-smp
  • ubuntu-upgrade-linux-image-3-13-0-156-generic
  • ubuntu-upgrade-linux-image-3-13-0-156-generic-lpae
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-lts-trusty
  • ubuntu-upgrade-linux-image-generic-lts-trusty
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-powerpc-e500
  • ubuntu-upgrade-linux-image-powerpc-e500mc
  • ubuntu-upgrade-linux-image-powerpc-smp
  • ubuntu-upgrade-linux-image-powerpc64-emb
  • ubuntu-upgrade-linux-image-powerpc64-smp

References

  • USN-3742-1
  • USN-3742-2
  • USN-3742-3
  • 104909
  • 1041414
  • RHSA-2018:2948
  • RHSA-2018:3083
  • RHSA-2018:3096
  • RHSA-2018:3459
  • RHSA-2018:3540
  • RHSA-2018:3586
  • RHSA-2018:3590
  • RHSA-2018:3591
  • CVE-2017-18344
View more

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
Free InsightVM Trial View All Features

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

;