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Out-of-bounds Read Affecting kernel-uek-debug package, versions <0:2.6.39-400.301.1.el6uek

Severity

 Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.12% (47th percentile)

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  • Snyk IDSNYK-ORACLE6-KERNELUEKDEBUG-2529796
  • published10 Apr 2022
  • disclosed26 Jul 2018
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Introduced: 26 Jul 2018

CVE-2017-18344  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Oracle:6 kernel-uek-debug to version 0:2.6.39-400.301.1.el6uek or higher.
This issue was patched in ELSA-2018-4214.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-debug package and not the kernel-uek-debug package as distributed by Oracle. See How to fix? for Oracle:6 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).

References