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CVE-2016-4485

Published: 23 May 2016

The llc_cmsg_rcv function in net/llc/af_llc.c in the Linux kernel before 4.5.5 does not initialize a certain data structure, which allows attackers to obtain sensitive information from kernel stack memory by reading a message.

From the Ubuntu Security Team

Kangjie Lu discovered an information leak in the ANSI/IEEE 802.2 LLC type 2 Support implementations in the Linux kernel. A local attacker could use this to obtain potentially sensitive information from kernel memory.

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

7.5

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian 		precise
Released (3.2.0-104.145)
trusty
Released (3.13.0-87.133)
upstream
Released (4.6)
wily
Released (4.2.0-38.45)
xenial
Released (4.4.0-24.43)
yakkety Not vulnerable
(4.4.0-23.41)
zesty Not vulnerable
(4.8.0-22.24)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by b8670c09f37bdf2847cc44f36511a53afc6161fd
linux-armadaxp
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was released [3.2.0-1667.92])
trusty Does not exist

upstream
Released (4.6)
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 		precise Does not exist

trusty Not vulnerable
(4.4.0-1002.2)
upstream
Released (4.6)
xenial Not vulnerable
(4.4.0-1001.10)
yakkety Does not exist

zesty Does not exist

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

trusty Does not exist
(trusty was ignored)
upstream
Released (4.6)
wily Ignored
(reached end-of-life)
xenial Ignored
(abandoned)
yakkety Ignored
(abandoned)
zesty Does not exist

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

trusty Does not exist

upstream
Released (4.6)
xenial Not vulnerable
(4.4.0-1003.3)
yakkety Does not exist

zesty Does not exist

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

trusty Does not exist
(trusty was ignored)
upstream
Released (4.6)
wily Ignored
(reached end-of-life)
xenial Ignored
(abandoned)
yakkety Ignored
(abandoned)
zesty Ignored
(abandoned)
linux-grouper
Launchpad, Ubuntu, Debian 		precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.6)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Does not exist

upstream
Released (4.6)
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 		precise Does not exist

trusty Does not exist

upstream
Released (4.6)
xenial Not vulnerable
(4.8.0-36.36~16.04.1)
yakkety Does not exist

zesty Does not exist

linux-linaro-omap
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was ignored [abandoned])
trusty Does not exist

upstream
Released (4.6)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was ignored [abandoned])
trusty Does not exist

upstream
Released (4.6)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was ignored [abandoned])
trusty Does not exist

upstream
Released (4.6)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was ignored [end-of-life])
trusty Does not exist

upstream
Released (4.6)
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 		precise Does not exist
(precise was ignored [end-of-life])
trusty Does not exist

upstream
Released (4.6)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was ignored [end-of-life])
trusty Does not exist

upstream
Released (4.6)
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 		precise
Released (3.13.0-88.135~precise1)
trusty Does not exist

upstream
Released (4.6)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Does not exist
(trusty was released [3.16.0-73.95~14.04.1])
upstream
Released (4.6)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Does not exist
(trusty was released [3.19.0-61.69~14.04.1])
upstream
Released (4.6)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Does not exist
(trusty was released [4.2.0-38.45~14.04.1])
upstream
Released (4.6)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty
Released (4.4.0-24.43~14.04.1)
upstream
Released (4.6)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Does not exist
(trusty was ignored)
upstream
Released (4.6)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Does not exist
(trusty was ignored)
upstream
Released (4.6)
wily Ignored
(reached end-of-life)
xenial Ignored
(abandoned)
yakkety Ignored
(abandoned)
zesty Does not exist

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

trusty Does not exist
(trusty was ignored)
upstream
Released (4.6)
wily Ignored
(reached end-of-life)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-qcm-msm
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was ignored [abandoned])
trusty Does not exist

upstream
Released (4.6)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian 		precise Does not exist

trusty Does not exist

upstream
Released (4.6)
wily
Released (4.2.0-1031.41)
xenial
Released (4.4.0-1012.16)
yakkety Not vulnerable
(4.4.0-1011.14)
zesty Not vulnerable
(4.8.0-1013.15)
linux-snapdragon
Launchpad, Ubuntu, Debian 		precise Does not exist

trusty Does not exist

upstream
Released (4.6)
wily Does not exist

xenial
Released (4.4.0-1015.18)
yakkety Not vulnerable
(4.4.0-1014.16)
zesty Not vulnerable
(4.4.0-1029.32)
linux-ti-omap4
Launchpad, Ubuntu, Debian 		precise Does not exist
(precise was released [3.2.0-1482.109])
trusty Does not exist

upstream
Released (4.6)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Bugs

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