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CVE-2017-16939

Published: 24 November 2017

The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.

From the Ubuntu Security Team

Mohamed Ghannam discovered that a use-after-free vulnerability existed in the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Notes

AuthorNote
sbeattie
priority is low for linux_precise/esm, as unprivileged user
namespaces is not implemented there.

Mitigation

If unprivileged user namespaces are not needed, set the
kernel.unprivileged_userns_clone sysctl to 0.
Priority

High

CVSS 3 base score: 7.8

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
artful
Released (4.13.0-19.22)
bionic Not vulnerable
(4.13.0-25.29)
precise Ignored
(was needed ESM criteria)
trusty
Released (3.13.0-137.186)
upstream
Released (4.14~rc7)
xenial
Released (4.4.0-103.126)
zesty
Released (4.10.0-42.46)
Patches:
Introduced by

12a169e7d8f4b1c95252d8b04ed0f1033ed7cfe2

Fixed by 1137b5e2529a8f5ca8ee709288ecba3e68044df2
linux-armadaxp
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.14~rc7)
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 (4.4.0-1005.5)
upstream
Released (4.14~rc7)
xenial
Released (4.4.0-1043.52)
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 (4.14~rc7)
xenial
Released (4.11.0-1016.16)
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 (4.14~rc7)
xenial
Released (4.4.0-9020.21)
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 (4.14~rc7)
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 (4.14~rc7)
xenial
Released (4.13.0-1002.5)
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 (4.14~rc7)
xenial Ignored
(was pending 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 (4.14~rc7)
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 (4.14~rc7)
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 (4.14~rc7)
xenial
Released (4.10.0-42.46~16.04.1)
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 (4.14~rc7)
xenial
Released (4.10.0-42.46~16.04.1)
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 (4.14~rc7)
xenial
Released (4.4.0-1012.17)
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 (4.14~rc7)
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 (4.14~rc7)
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 (4.14~rc7)
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 (4.14~rc7)
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 (4.14~rc7)
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 (4.14~rc7)
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 (3.13.0-137.186~precise1)
trusty Does not exist

upstream
Released (4.14~rc7)
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 (4.14~rc7)
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 (4.14~rc7)
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 (4.14~rc7)
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 (4.4.0-103.126~14.04.1)
upstream
Released (4.14~rc7)
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 (4.14~rc7)
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 (4.14~rc7)
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 (4.14~rc7)
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 (4.14~rc7)
xenial
Released (4.13.0-1010.11)
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 (4.14~rc7)
xenial Does not exist

zesty Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
artful
Released (4.13.0-1008.8)
bionic Not vulnerable
(4.13.0-1008.8)
precise Does not exist

trusty Does not exist

upstream
Released (4.14~rc7)
xenial
Released (4.4.0-1079.87)
zesty
Released (4.10.0-1023.26)
linux-snapdragon
Launchpad, Ubuntu, Debian
artful
Released (4.4.0-1081.86)
bionic Not vulnerable

precise Does not exist

trusty Does not exist

upstream
Released (4.14~rc7)
xenial
Released (4.4.0-1081.86)
zesty
Released (4.4.0-1081.86)
linux-ti-omap4
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (4.14~rc7)
xenial Does not exist

zesty Does not exist