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CVE-2017-7979

Published: 19 April 2017

The cookie feature in the packet action API implementation in net/sched/act_api.c in the Linux kernel 4.11.x through 4.11-rc7 mishandles the tb nlattr array, which allows local users to cause a denial of service (uninitialized memory access and refcount underflow, and system hang or crash) or possibly have unspecified other impact via "tc filter add" commands in certain contexts. NOTE: this does not affect stable kernels, such as 4.10.x, from kernel.org.

From the Ubuntu Security Team

Fabian Grünbichler discovered that the Packet action API implementation in the Linux kernel improperly handled uninitialized data. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

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

7.8

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Not vulnerable

trusty Not vulnerable

xenial Not vulnerable

yakkety Not vulnerable

zesty
Released (4.10.0-22.24)
Patches:
Introduced by

1045ba77a5962a22bce7777678ef46714107ea63

Fixed by e0535ce58b92d7baf0b33284a6c4f8f0338f943e
linux-armadaxp
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Not vulnerable

trusty 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-flo
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Does not exist

trusty Does not exist
(trusty was ignored)
xenial Not vulnerable

yakkety Ignored
(end of life)
zesty Does not exist

linux-goldfish
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Does not exist

trusty Does not exist
(trusty was ignored)
xenial Not vulnerable

yakkety Ignored
(end of life)
zesty Ignored
(end of life)
linux-grouper
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Does not exist

trusty Does not exist
(trusty was ignored)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-linaro-omap
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Ignored
(end of life)
trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Ignored
(end of life)
trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Ignored
(end of life)
trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Ignored
(end of life)
trusty 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
upstream
Released (4.11~rc8)
precise Ignored
(end of life)
trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Ignored
(end of life)
trusty 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
upstream
Released (4.11~rc8)
precise Does not exist

trusty Not vulnerable

xenial Not vulnerable

yakkety Does not exist

zesty Does not exist

linux-azure
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
trusty Not vulnerable
(4.15.0-1023.24~14.04.1)
xenial Not vulnerable
(4.11.0-1009.9)
yakkety Does not exist

zesty Does not exist

linux-euclid
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
trusty Does not exist

xenial Not vulnerable

zesty Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
trusty Does not exist

xenial Not vulnerable
(4.10.0-1004.4)
yakkety Does not exist

zesty Does not exist

linux-gke
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Does not exist

trusty Does not exist

xenial Not vulnerable

yakkety Does not exist

zesty Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Does not exist

trusty Does not exist

xenial Not vulnerable
(4.10.0-27.30~16.04.2)
yakkety Does not exist

zesty Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Does not exist

trusty Does not exist

xenial Not vulnerable
(4.10.0-27.30~16.04.2)
yakkety Does not exist

zesty Does not exist

linux-kvm
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
trusty Does not exist

xenial Not vulnerable

zesty Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Does not exist

trusty Not vulnerable

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
upstream
Released (4.11~rc8)
precise Does not exist

trusty Does not exist

xenial Not vulnerable

yakkety Not vulnerable

zesty Not vulnerable

linux-qcm-msm
Launchpad, Ubuntu, Debian
precise Ignored
(end of life)
trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.11~rc8)
linux-lts-trusty
Launchpad, Ubuntu, Debian
precise Not vulnerable

trusty Does not exist

upstream
Released (4.11~rc8)
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 ignored [end of standard support])
upstream
Released (4.11~rc8)
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 not-affected)
upstream
Released (4.11~rc8)
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 ignored [end of standard support])
upstream
Released (4.11~rc8)
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 (4.11~rc8)
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 (4.11~rc8)
xenial Not vulnerable

yakkety Ignored
(end of life)
zesty Does not exist

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

trusty Does not exist
(trusty was ignored)
upstream
Released (4.11~rc8)
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 (4.11~rc8)
xenial Not vulnerable

yakkety Not vulnerable

zesty
Released (4.10.0-1006.8)
linux-ti-omap4
Launchpad, Ubuntu, Debian
precise Not vulnerable

trusty Does not exist

upstream
Released (4.11~rc8)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H