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CVE-2017-1000371

Published: 19 June 2017

The offset2lib patch as used by the Linux Kernel contains a vulnerability, if RLIMIT_STACK is set to RLIM_INFINITY and 1 Gigabyte of memory is allocated (the maximum under the 1/4 restriction) then the stack will be grown down to 0x80000000, and as the PIE binary is mapped above 0x80000000 the minimum distance between the end of the PIE binary's read-write segment and the start of the stack becomes small enough that the stack guard page can be jumped over by an attacker. This affects Linux Kernel version 4.11.5. This is a different issue than CVE-2017-1000370 and CVE-2017-1000365. This issue appears to be limited to i386 based systems.

From the Ubuntu Security Team

It was discovered that the Linux kernel did not properly separate a process' stack and its binary mapping in some situations. A local attacker could use this to possibly execute arbitrary code.

Notes

AuthorNote
tyhicks
The original offset2lib issue was not assigned a CVE and the fix is
only in 15.04 (Vivid) and newer kernels.

Priority

Medium

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
artful Not vulnerable
(4.11.0-13.19)
trusty Not vulnerable

xenial
Released (4.4.0-93.116)
yakkety Ignored
(end of life)
zesty Ignored
(end of life, was pending)
upstream
Released (4.13~rc1)
Patches:
Introduced by

d1fd836dcf00d2028c700c7e44d2c23404062c90

Fixed by eab09532d40090698b05a07c1c87f39fdbc5fab5
linux-armadaxp
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
artful Does not exist

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

trusty Not vulnerable
(4.4.0-1002.2)
xenial
Released (4.4.0-1032.41)
yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
linux-azure
Launchpad, Ubuntu, Debian
artful Does not exist

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

upstream
Released (4.13~rc1)
linux-gke
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist

xenial
Released (4.4.0-1028.28)
yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
linux-goldfish
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
xenial Not vulnerable

yakkety Not vulnerable

zesty Not vulnerable

upstream
Released (4.13~rc1)
linux-grouper
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
linux-hwe
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist

xenial
Released (4.13.0-26.29~16.04.2)
yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist

xenial
Released (4.13.0-26.29~16.04.2)
yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
linux-linaro-omap
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
linux-linaro-shared
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
linux-lts-quantal
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
linux-lts-saucy
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
linux-lts-xenial
Launchpad, Ubuntu, Debian
artful Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
trusty
Released (4.4.0-93.116~14.04.1)
xenial Does not exist

yakkety Does not exist

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

trusty Does not exist
(trusty was ignored [abandoned])
xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
linux-mako
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
xenial Ignored
(abandoned)
yakkety Ignored
(end of life)
zesty Does not exist

upstream
Released (4.13~rc1)
linux-manta
Launchpad, Ubuntu, Debian
trusty Does not exist
(trusty was ignored [abandoned])
xenial Does not exist

upstream
Released (4.13~rc1)
artful Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
linux-raspi2
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial
Released (4.4.0-1071.79)
yakkety Ignored
(end of life)
zesty Ignored
(end of life, was pending)
upstream
Released (4.13~rc1)
artful Not vulnerable
(4.13.0-1004.4)
linux-snapdragon
Launchpad, Ubuntu, Debian
artful Not vulnerable
(4.4.0-1073.78)
trusty Does not exist

xenial
Released (4.4.0-1073.78)
yakkety Ignored
(end of life)
zesty
Released (4.4.0-1073.78)
upstream
Released (4.13~rc1)
linux-ti-omap4
Launchpad, Ubuntu, Debian
artful Does not exist

trusty Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.13~rc1)
linux-flo
Launchpad, Ubuntu, Debian
upstream
Released (4.13~rc1)
artful Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
xenial Ignored
(abandoned)
yakkety Ignored
(end of life)
zesty Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
upstream
Released (4.13~rc1)
trusty Does not exist
(trusty was ignored [end of standard support])
xenial Does not exist

artful Does not exist

yakkety Does not exist

zesty Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
upstream
Released (4.13~rc1)
artful Does not exist

trusty Does not exist

xenial
Released (4.13.0-1002.5)
yakkety Does not exist

zesty Does not exist

linux-kvm
Launchpad, Ubuntu, Debian
upstream
Released (4.13~rc1)
artful Does not exist

trusty Does not exist

xenial
Released (4.4.0-1007.12)
zesty Does not exist

linux-lts-vivid
Launchpad, Ubuntu, Debian
upstream
Released (4.13~rc1)
artful Does not exist

trusty Ignored
(end of life, was needed)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-wily
Launchpad, Ubuntu, Debian
upstream
Released (4.13~rc1)
artful Does not exist

trusty Does not exist
(trusty was ignored [end of standard support])
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-euclid
Launchpad, Ubuntu, Debian
upstream
Released (4.13~rc1)
artful Does not exist

trusty Does not exist

xenial Ignored
(was needed ESM criteria)
zesty Does not exist

linux-oem
Launchpad, Ubuntu, Debian
upstream
Released (4.13~rc1)
artful Does not exist

trusty Does not exist

xenial Not vulnerable
(4.13.0-1008.9)
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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H