CVE-2018-12896

2018-07-0200:00:00

ubuntu.com

2.1 Low

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.0004 Low

EPSS

Percentile

10.1%

JSON

An issue was discovered in the Linux kernel through 4.17.3. An Integer
Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by
the way the overrun accounting works. Depending on interval and expiry time
values, the overrun can be larger than INT_MAX, but the accounting is int
based. This basically makes the accounting values, which are visible to
user space via timer_getoverrun(2) and siginfo::si_overrun, random. For
example, a local user can cause a denial of service (signed integer
overflow) via crafted mmap, futex, timer_create, and timer_settime system
calls.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-43.46UNKNOWN
ubuntu14.04noarchlinux< 3.13.0-164.214UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-141.167UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1031.33UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1037.40UNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1074.84UNKNOWN
ubuntu16.04noarchlinux-aws-hwe< 4.15.0-1031.33~16.04.1UNKNOWN
ubuntu18.04noarchlinux-azure< 4.15.0-1036.38UNKNOWN
ubuntu14.04noarchlinux-azure< 4.15.0-1036.38~14.04.2UNKNOWN
ubuntu16.04noarchlinux-azure< 4.15.0-1036.38~16.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-43.46	UNKNOWN
ubuntu	14.04	noarch	linux	< 3.13.0-164.214	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-141.167	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1031.33	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1037.40	UNKNOWN
ubuntu	16.04	noarch	linux-aws	< 4.4.0-1074.84	UNKNOWN
ubuntu	16.04	noarch	linux-aws-hwe	< 4.15.0-1031.33~16.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-azure	< 4.15.0-1036.38	UNKNOWN
ubuntu	14.04	noarch	linux-azure	< 4.15.0-1036.38~14.04.2	UNKNOWN
ubuntu	16.04	noarch	linux-azure	< 4.15.0-1036.38~16.04.1	UNKNOWN