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CVE-2016-4997

Published: 24 June 2016

The compat IPT_SO_SET_REPLACE and IP6T_SO_SET_REPLACE setsockopt implementations in the netfilter subsystem in the Linux kernel before 4.6.3 allow local users to gain privileges or cause a denial of service (memory corruption) by leveraging in-container root access to provide a crafted offset value that triggers an unintended decrement.

From the Ubuntu security team

Jesse Hertz and Tim Newsham discovered that the Linux netfilter implementation did not correctly perform validation when handling 32 bit compatibility IPT_SO_SET_REPLACE events on 64 bit platforms. A local unprivileged attacker could use this to cause a denial of service (system crash) or execute arbitrary code with administrative privileges.

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
sbeattie
priority is negligible on precise's 3.2 kernels, as user
namespaces are a privileged operation there.
For xenial and linux-lts-xenial on trusty, this can be
mitigated against by setting the kernel.unprivileged_userns_clone
sysctl to 0 to disable userns support. When we fix the netfilter issue
we will also add this sysctl to all other supported kernels to allow
disabling unprivileged user namespaces. Disabling user namespace may
impact chromium-browser, lxc, lxd, docker, and other tools.
Priority

High

CVSS 3 base score: 7.8

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
artful Not vulnerable
(4.10.0-19.21)
precise
Released (3.2.0-128.173)
trusty
Released (3.13.0-91.138)
upstream
Released (4.7~rc1)
wily
Released (4.2.0-41.48)
xenial
Released (4.4.0-28.47)
yakkety Not vulnerable
(4.4.0-28.47)
zesty Not vulnerable
(4.8.0-22.24)
Patches:
Introduced by

2722971cbe831117686039d5c334f2c0f560be13

Fixed by ce683e5f9d045e5d67d1312a42b359cb2ab2a13c
Introduced by

2722971cbe831117686039d5c334f2c0f560be13

Fixed by 6e94e0cfb0887e4013b3b930fa6ab1fe6bb6ba91
Introduced by

2722971cbe831117686039d5c334f2c0f560be13

Fixed by bdf533de6968e9686df777dc178486f600c6e617
linux-armadaxp
Launchpad, Ubuntu, Debian
artful Does not exist

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

upstream
Released (4.7~rc1)
wily Does not exist

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 (4.7~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 (4.7~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 (4.7~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 (4.7~rc1)
wily Ignored
(reached end-of-life)
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 (4.7~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 (4.7~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 (4.7~rc1)
wily Ignored
(reached end-of-life)
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 (4.7~rc1)
wily Does not exist

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 (4.7~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 (4.7~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 (4.7~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 (4.7~rc1)
wily Does not exist

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 (4.7~rc1)
wily Does not exist

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 (4.7~rc1)
wily Does not exist

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 (4.7~rc1)
wily Does not exist

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 (4.7~rc1)
wily Does not exist

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 (4.7~rc1)
wily Does not exist

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 (3.13.0-91.138~precise1)
trusty Does not exist

upstream
Released (4.7~rc1)
wily Does not exist

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 released [3.16.0-76.98~14.04.1])
upstream
Released (4.7~rc1)
wily Does not exist

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 released [3.19.0-64.72~14.04.1])
upstream
Released (4.7~rc1)
wily Does not exist

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 released [4.2.0-41.48~14.04.1])
upstream
Released (4.7~rc1)
wily Does not exist

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 (4.4.0-28.47~14.04.1)
upstream
Released (4.7~rc1)
wily Does not exist

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 (4.7~rc1)
wily Does not exist

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 (4.7~rc1)
wily Ignored
(reached end-of-life)
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 (4.7~rc1)
wily Ignored
(reached end-of-life)
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 (4.7~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 (4.7~rc1)
wily Does not exist

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 (4.7~rc1)
wily
Released (4.2.0-1033.43)
xenial
Released (4.4.0-1016.22)
yakkety Not vulnerable
(4.4.0-1016.22)
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 (4.7~rc1)
wily Does not exist

xenial
Released (4.4.0-1019.22)
yakkety Not vulnerable
(4.4.0-1019.22)
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 (4.7~rc1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist