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Out-of-bounds Read Affecting kernel-default-man package, versions <4.12.14-25.6.1

Severity

 Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.1% (43rd percentile)

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  • Snyk IDSNYK-SLES150-KERNELDEFAULTMAN-2763123
  • published14 Apr 2022
  • disclosed6 Aug 2018
Report a new vulnerability Found a mistake?

Introduced: 6 Aug 2018

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

How to fix?

Upgrade SLES:15.0 kernel-default-man to version 4.12.14-25.6.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-default-man package and not the kernel-default-man package as distributed by SLES. See How to fix? for SLES:15.0 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