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Out-of-bounds Read Affecting kernel-rt-debug package, versions <0:3.10.0-957.rt56.910.el7

Severity

 Recommended
0.0
high
0
10

Based on CentOS security rating

    Threat Intelligence

    Exploit Maturity
    Mature
    EPSS
    0.1% (42nd percentile)

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  • Snyk ID SNYK-CENTOS7-KERNELRTDEBUG-2112256
  • published 26 Jul 2021
  • disclosed 15 Dec 2017
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Introduced: 15 Dec 2017

CVE-2017-18344 Open this link in a new tab
CWE-125 Open this link in a new tab

How to fix?

Upgrade Centos:7 kernel-rt-debug to version 0:3.10.0-957.rt56.910.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug package and not the kernel-rt-debug package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

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).