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CVE-2017-7187

Published: 20 March 2017

The sg_ioctl function in drivers/scsi/sg.c in the Linux kernel through 4.10.4 allows local users to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact via a large command size in an SG_NEXT_CMD_LEN ioctl call, leading to out-of-bounds write access in the sg_write function.

From the Ubuntu Security Team

Dmitry Vyukov discovered that the generic SCSI (sg) subsystem in the Linux kernel contained a stack-based buffer overflow. A local attacker with access to an sg device could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Notes

AuthorNote
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

Priority

Medium

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian 		artful Not vulnerable
(4.10.0-21.23)
precise Ignored
(was needed ESM criteria)
trusty
Released (3.13.0-132.181)
upstream
Released (4.11~rc5)
xenial
Released (4.4.0-78.99)
yakkety Ignored
(reached end-of-life)
zesty
Released (4.10.0-21.23)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by bf33f87dd04c371ea33feb821b60d63d754e3124
linux-armadaxp
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist
(precise was needed)
trusty Does not exist

upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Not vulnerable
(4.4.0-1002.2)
upstream
Released (4.11~rc5)
xenial
Released (4.4.0-1017.26)
yakkety Does not exist

zesty Does not exist

linux-azure
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Not vulnerable
(4.15.0-1023.24~14.04.1)
upstream
Released (4.11~rc5)
xenial Not vulnerable
(4.11.0-1009.9)
yakkety Does not exist

zesty Does not exist

linux-euclid
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.11~rc5)
xenial Ignored
(was needed ESM criteria)
zesty Does not exist

linux-flo
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.11~rc5)
xenial Ignored
(abandoned)
yakkety Ignored
(abandoned)
zesty Does not exist

linux-gcp
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.11~rc5)
xenial Not vulnerable
(4.10.0-1004.4)
yakkety Does not exist

zesty Does not exist

linux-gke
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.11~rc5)
xenial
Released (4.4.0-1013.13)
yakkety Does not exist

zesty Does not exist

linux-goldfish
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.11~rc5)
xenial Ignored
(abandoned)
yakkety Ignored
(abandoned)
zesty Ignored
(abandoned)
linux-grouper
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-hwe
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.11~rc5)
xenial
Released (4.10.0-27.30~16.04.2)
yakkety Does not exist

zesty Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.11~rc5)
xenial
Released (4.10.0-27.30~16.04.2)
yakkety Does not exist

zesty Does not exist

linux-kvm
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.11~rc5)
xenial Not vulnerable
(4.4.0-1004.9)
zesty Does not exist

linux-linaro-omap
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist
(precise was ignored [abandoned])
trusty Does not exist

upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist
(precise was ignored [abandoned])
trusty Does not exist

upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist
(precise was ignored [abandoned])
trusty Does not exist

upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist
(precise was ignored [end-of-life])
trusty Does not exist

upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist
(precise was ignored [end-of-life])
trusty Does not exist

upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist
(precise was ignored [end-of-life])
trusty Does not exist

upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian 		artful Does not exist

precise
Released (3.13.0-132.181~precise1)
trusty Does not exist

upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [out of standard support])
upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-vivid
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [was needed now end-of-life])
upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-wily
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [out of standard support])
upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty
Released (4.4.0-78.99~14.04.2)
upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-maguro
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-mako
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.11~rc5)
xenial Ignored
(abandoned)
yakkety Ignored
(abandoned)
zesty Does not exist

linux-manta
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-oem
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.11~rc5)
xenial Not vulnerable
(4.13.0-1008.9)
zesty Does not exist

linux-qcm-msm
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist
(precise was ignored [abandoned])
trusty Does not exist

upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian 		artful Not vulnerable
(4.10.0-1005.7)
precise Does not exist

trusty Does not exist

upstream
Released (4.11~rc5)
xenial
Released (4.4.0-1055.62)
yakkety Ignored
(reached end-of-life)
zesty
Released (4.10.0-1005.7)
linux-snapdragon
Launchpad, Ubuntu, Debian 		artful Not vulnerable
(4.4.0-1058.62)
precise Does not exist

trusty Does not exist

upstream
Released (4.11~rc5)
xenial
Released (4.4.0-1058.62)
yakkety
Released (4.4.0-1058.62)
zesty
Released (4.4.0-1058.62)
linux-ti-omap4
Launchpad, Ubuntu, Debian 		artful Does not exist

precise Does not exist
(precise was needed)
trusty Does not exist

upstream
Released (4.11~rc5)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

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