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CVE-2017-17807

Published: 20 December 2017

The KEYS subsystem in the Linux kernel before 4.14.6 omitted an access-control check when adding a key to the current task's "default request-key keyring" via the request_key() system call, allowing a local user to use a sequence of crafted system calls to add keys to a keyring with only Search permission (not Write permission) to that keyring, related to construct_get_dest_keyring() in security/keys/request_key.c.

From the Ubuntu Security Team

It was discovered that the keyring implementation in the Linux kernel did not properly check permissions when a key request was performed on a task's default keyring. A local attacker could use this to add keys to unauthorized keyrings.

Priority

Medium

Cvss 3 Severity Score

3.3

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
artful
Released (4.13.0-38.43)
bionic Not vulnerable
(4.15.0-10.11)
precise Ignored
(was needed ESM criteria)
trusty
Released (3.13.0-144.193)
upstream
Released (4.15~rc3)
xenial
Released (4.4.0-119.143)
zesty Ignored
(reached end-of-life)
Patches:
Introduced by

3e30148c3d524a9c1c63ca28261bc24c457eb07a

Fixed by 4dca6ea1d9432052afb06baf2e3ae78188a4410b
linux-armadaxp
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial 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

bionic Not vulnerable
(4.15.0-1001.1)
precise Does not exist

trusty
Released (4.4.0-1016.16)
upstream
Released (4.15~rc3)
xenial
Released (4.4.0-1054.63)
zesty Does not exist

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

bionic Not vulnerable
(4.15.0-1002.2)
precise Does not exist

trusty Not vulnerable
(4.15.0-1023.24~14.04.1)
upstream
Released (4.15~rc3)
xenial
Released (4.13.0-1014.17)
zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial Ignored
(was needed ESM criteria)
zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.15~rc3)
xenial Ignored
(abandoned)
zesty Does not exist

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

bionic Not vulnerable
(4.15.0-1001.1)
precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial
Released (4.13.0-1012.16)
zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial Ignored
(was needed now end-of-life)
zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.15~rc3)
xenial Ignored
(was needed now end-of-life)
zesty Ignored
(reached end-of-life)
linux-grouper
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

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

bionic Not vulnerable

precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial
Released (4.13.0-38.43~16.04.1)
zesty Does not exist

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

bionic
Released (4.18.0-8.9~18.04.1)
precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial
Released (4.13.0-38.43~16.04.1)
zesty Does not exist

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

bionic Not vulnerable
(4.15.0-1002.2)
precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial
Released (4.4.0-1020.25)
zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

precise Ignored
(end-of-life)
trusty Does not exist

upstream
Released (4.15~rc3)
xenial 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

bionic Does not exist

precise Ignored
(end-of-life)
trusty Does not exist

upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

precise Ignored
(end-of-life)
trusty Does not exist

upstream
Released (4.15~rc3)
xenial 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

bionic Does not exist

precise
Released (3.13.0-144.193~precise1)
trusty Does not exist

upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [out of standard support])
upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [was needs-triage now end-of-life])
upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [out of standard support])
upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty
Released (4.4.0-119.143~14.04.1)
upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.15~rc3)
xenial Ignored
(abandoned)
zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

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

bionic Not vulnerable
(4.15.0-1002.3)
precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial
Released (4.13.0-1022.24)
zesty Does not exist

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

bionic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
artful
Released (4.13.0-1016.17)
bionic Not vulnerable
(4.15.0-1006.7)
precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial
Released (4.4.0-1086.94)
zesty Ignored
(reached end-of-life)
linux-snapdragon
Launchpad, Ubuntu, Debian
artful
Released (4.4.0-1088.93)
bionic Not vulnerable

precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial
Released (4.4.0-1088.93)
zesty Ignored
(reached end-of-life)
linux-ti-omap4
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.15~rc3)
xenial Does not exist

zesty Does not exist

Severity score breakdown

Parameter Value
Base score 3.3
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact None
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N