Design/Logic Flaw

2018-07-2619:29:00

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www.prio-n.com

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

5.9 Medium

AI Score

Confidence

High

2.1 Low

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:L/Au:N/C:P/I:N/A:N

0.001 Low

EPSS

Percentile

39.3%

JSON

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).

CPENameOperatorVersion
ubuntu_linuxeq14.04
ubuntu_linuxeq12.04
linux_kernellt4.14.8
enterprise_linux_desktopeq7.0
enterprise_linux_servereq7.0
enterprise_linux_server_auseq7.2
enterprise_linux_server_auseq7.3
enterprise_linux_server_auseq7.4
enterprise_linux_server_euseq7.3
enterprise_linux_server_euseq7.5

Name	Operator	Version
ubuntu_linux	eq	14.04
ubuntu_linux	eq	12.04
linux_kernel	lt	4.14.8
enterprise_linux_desktop	eq	7.0
enterprise_linux_server	eq	7.0
enterprise_linux_server_aus	eq	7.2
enterprise_linux_server_aus	eq	7.3
enterprise_linux_server_aus	eq	7.4
enterprise_linux_server_eus	eq	7.3
enterprise_linux_server_eus	eq	7.5