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CVE-2017-6951

Published: 16 March 2017

The keyring_search_aux function in security/keys/keyring.c in the Linux kernel through 3.14.79 allows local users to cause a denial of service (NULL pointer dereference and OOPS) via a request_key system call for the "dead" type.

From the Ubuntu security team

It was discovered that the keyring implementation in the Linux kernel did not properly restrict searches for dead keys. A local attacker could use this to cause a denial of service (system crash).

Notes

AuthorNote
sbeattie
partially fixed by c06cfb08b88dfbe13be44a69ae2fdc3a7c902d81
though see http://www.spinics.net/lists/keyrings/msg01883.html
in the Red Hat bug report, David Howells has an alternate fix
that may be more appropriate for live-patching than
c06cfb08b88dfbe13be44a69ae2fdc3a7c902d81 :
https://bugzilla.redhat.com/attachment.cgi?id=1268882
Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
artful Not vulnerable
(4.10.0-19.21)
precise Ignored
(was needed ESM criteria)
trusty
Released (3.13.0-132.181)
upstream
Released (3.18~rc1)
xenial Not vulnerable
(4.2.0-16.19)
yakkety Not vulnerable
(4.4.0-21.37)
zesty Not vulnerable
(4.8.0-22.24)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by c06cfb08b88dfbe13be44a69ae2fdc3a7c902d81|c1644fe041ebaf6519f6809146a77c3ead9193af
linux-armadaxp
Launchpad, Ubuntu, Debian
artful Does not exist

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

upstream
Released (3.18~rc1)
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 (3.18~rc1)
xenial Not vulnerable
(4.4.0-1001.10)
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 (3.18~rc1)
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 (3.18~rc1)
xenial Not vulnerable
(4.4.0-9019.20)
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 (3.18~rc1)
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 (3.18~rc1)
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 (3.18~rc1)
xenial Not vulnerable
(4.4.0-1003.3)
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 (3.18~rc1)
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 (3.18~rc1)
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 (3.18~rc1)
xenial Not vulnerable
(4.8.0-36.36~16.04.1)
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 (3.18~rc1)
xenial Not vulnerable
(4.8.0-36.36~16.04.1)
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 (3.18~rc1)
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 (3.18~rc1)
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 (3.18~rc1)
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 (3.18~rc1)
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 (3.18~rc1)
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 (3.18~rc1)
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 (3.18~rc1)
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 (3.18~rc1)
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 (3.18~rc1)
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 not-affected [3.19.0-18.18~14.04.1])
upstream
Released (3.18~rc1)
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 (3.18~rc1)
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 Not vulnerable
(4.4.0-13.29~14.04.1)
upstream
Released (3.18~rc1)
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 (3.18~rc1)
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 (3.18~rc1)
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 (3.18~rc1)
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 (3.18~rc1)
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 (3.18~rc1)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
artful Not vulnerable
(4.10.0-1004.6)
precise Does not exist

trusty Does not exist

upstream
Released (3.18~rc1)
xenial Not vulnerable
(4.2.0-1013.19)
yakkety Not vulnerable
(4.4.0-1009.10)
zesty Not vulnerable
(4.8.0-1013.15)
linux-snapdragon
Launchpad, Ubuntu, Debian
artful Not vulnerable
(4.4.0-1050.54)
precise Does not exist

trusty Does not exist

upstream
Released (3.18~rc1)
xenial Not vulnerable
(4.4.0-1012.12)
yakkety Not vulnerable
(4.4.0-1012.12)
zesty Not vulnerable
(4.4.0-1029.32)
linux-ti-omap4
Launchpad, Ubuntu, Debian
artful Does not exist

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

upstream
Released (3.18~rc1)
xenial Does not exist

yakkety Does not exist

zesty Does not exist