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CVE-2017-17862

Published: 27 December 2017

kernel/bpf/verifier.c in the Linux kernel through 4.14.8 ignores unreachable code, even though it would still be processed by JIT compilers. This behavior, also considered an improper branch-pruning logic issue, could possibly be used by local users for denial of service.

From the Ubuntu Security Team

Alexei Starovoitov discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel contained a branch-pruning logic issue around unreachable code. A local attacker could use this to cause a denial of service.

Notes

AuthorNote
sbeattie
incomplete fix resulted in bug 1763454

Priority

Medium

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.13.0-25.29)
upstream
Released (4.15~rc1)
artful
Released (4.13.0-25.29)
trusty Not vulnerable

xenial
Released (4.4.0-119.143)
zesty Ignored
(end of life)
Patches:
Introduced by

17a5267067f3c372fec9ffb798d6eaba6b5e6a4c

Fixed by c131187db2d3fa2f8bf32fdf4e9a4ef805168467
linux-armadaxp
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.15~rc1)
artful Does not exist

trusty Does not exist

xenial Does not exist

zesty Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-flo
Launchpad, Ubuntu, Debian
bionic Does not exist

artful Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.15~rc1)
xenial Ignored
(abandoned)
zesty Does not exist

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

bionic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.15~rc1)
xenial Does not exist

zesty Does not exist

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

bionic Not vulnerable
(4.15.0-1002.2)
trusty Not vulnerable
(4.15.0-1023.24~14.04.1)
upstream
Released (4.15~rc1)
xenial
Released (4.13.0-1005.7)
zesty Does not exist

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

bionic Does not exist

trusty Does not exist

upstream
Released (4.15~rc1)
xenial Ignored
(was needed ESM criteria)
zesty Does not exist

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

bionic Not vulnerable
(4.15.0-1001.1)
trusty
Released (4.4.0-1016.16)
upstream
Released (4.15~rc1)
xenial
Released (4.4.0-1054.63)
zesty Does not exist

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

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

upstream
Released (4.15~rc1)
xenial
Released (4.13.0-1006.9)
zesty Does not exist

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

bionic Does not exist

trusty Does not exist

upstream
Released (4.15~rc1)
xenial Ignored
(end of standard support, was needed)
zesty Does not exist

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

bionic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.15~rc1)
xenial Not vulnerable

zesty Not vulnerable

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

bionic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.15~rc1)
xenial Does not exist

zesty Does not exist

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

bionic Not vulnerable

trusty Does not exist

upstream
Released (4.15~rc1)
xenial
Released (4.13.0-26.29~16.04.2)
zesty Does not exist

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

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

upstream
Released (4.15~rc1)
xenial
Released (4.13.0-26.29~16.04.2)
zesty Does not exist

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

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

upstream
Released (4.15~rc1)
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

trusty Does not exist

upstream
Released (4.15~rc1)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

trusty Does not exist

upstream
Released (4.15~rc1)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

trusty Does not exist

upstream
Released (4.15~rc1)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

trusty Does not exist

upstream
Released (4.15~rc1)
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

trusty Does not exist

upstream
Released (4.15~rc1)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

trusty Does not exist

upstream
Released (4.15~rc1)
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

trusty Does not exist

upstream
Released (4.15~rc1)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

trusty Does not exist
(trusty was ignored [end of standard support])
upstream
Released (4.15~rc1)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

trusty Ignored
(end of life, was needs-triage)
upstream
Released (4.15~rc1)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

trusty Does not exist
(trusty was ignored [end of standard support])
upstream
Released (4.15~rc1)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

trusty
Released (4.4.0-119.143~14.04.1)
upstream
Released (4.15~rc1)
xenial Does not exist

zesty Does not exist

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

bionic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.15~rc1)
xenial Ignored
(abandoned)
zesty Does not exist

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

bionic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.15~rc1)
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)
trusty Does not exist

upstream
Released (4.15~rc1)
xenial
Released (4.13.0-1015.16)
zesty Does not exist

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

bionic Does not exist

trusty Does not exist

upstream
Released (4.15~rc1)
xenial Does not exist

zesty Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
artful
Released (4.13.0-1011.11)
bionic Not vulnerable
(4.15.0-1006.7)
trusty Does not exist

upstream
Released (4.15~rc1)
xenial
Released (4.4.0-1086.94)
zesty Ignored
(end of life)
linux-snapdragon
Launchpad, Ubuntu, Debian
artful
Released (4.4.0-1088.93)
bionic Not vulnerable

trusty Does not exist

upstream
Released (4.15~rc1)
xenial
Released (4.4.0-1088.93)
zesty Ignored
(end of life)
linux-ti-omap4
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

trusty Does not exist

upstream
Released (4.15~rc1)
xenial Does not exist

zesty Does not exist

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H