CVE-2017-5669

2017-02-2400:00:00

ubuntu.com

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

4.6 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.0004 Low

EPSS

Percentile

5.3%

JSON

The do_shmat function in ipc/shm.c in the Linux kernel through 4.9.12 does
not restrict the address calculated by a certain rounding operation, which
allows local users to map page zero, and consequently bypass a protection
mechanism that exists for the mmap system call, by making crafted shmget
and shmat system calls in a privileged context.

Bugs

<https://bugzilla.kernel.org/show_bug.cgi?id=192931>

Notes

Author	Note
jdstrand	android kernels (flo, goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 14.10 and earlier preview kernels linux-lts-saucy no longer receives official support linux-lts-quantal no longer receives official support
tyhicks	See References for a link to the fix in the linux-next tree. As of 2017-02-27, I don’t see the fix in Linus’ tree.

OSVersionArchitecturePackageVersionFilename
ubuntu14.04noarchlinux< 3.13.0-142.191UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-75.96UNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1016.25UNKNOWN
ubuntu16.04noarchlinux-gke< 4.4.0-1012.12UNKNOWN
ubuntu16.04noarchlinux-hwe< 4.10.0-27.30~16.04.2UNKNOWN
ubuntu16.04noarchlinux-hwe-edge< 4.10.0-27.30~16.04.2UNKNOWN
ubuntu14.04noarchlinux-lts-xenial< 4.4.0-75.96~14.04.1UNKNOWN
ubuntu16.04noarchlinux-raspi2< 4.4.0-1054.61UNKNOWN
ubuntu16.04noarchlinux-snapdragon< 4.4.0-1057.61UNKNOWN
ubuntu16.10noarchlinux-snapdragon< 4.4.0-1057.61UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	14.04	noarch	linux	< 3.13.0-142.191	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-75.96	UNKNOWN
ubuntu	16.04	noarch	linux-aws	< 4.4.0-1016.25	UNKNOWN
ubuntu	16.04	noarch	linux-gke	< 4.4.0-1012.12	UNKNOWN
ubuntu	16.04	noarch	linux-hwe	< 4.10.0-27.30~16.04.2	UNKNOWN
ubuntu	16.04	noarch	linux-hwe-edge	< 4.10.0-27.30~16.04.2	UNKNOWN
ubuntu	14.04	noarch	linux-lts-xenial	< 4.4.0-75.96~14.04.1	UNKNOWN
ubuntu	16.04	noarch	linux-raspi2	< 4.4.0-1054.61	UNKNOWN
ubuntu	16.04	noarch	linux-snapdragon	< 4.4.0-1057.61	UNKNOWN
ubuntu	16.10	noarch	linux-snapdragon	< 4.4.0-1057.61	UNKNOWN