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CVE-2012-1090

Published: 28 February 2012

The cifs_lookup function in fs/cifs/dir.c in the Linux kernel before 3.2.10 allows local users to cause a denial of service (OOPS) via attempted access to a special file, as demonstrated by a FIFO. "The cifs code will attempt to open files on lookup under certain circumstances. What happens though if we find that the file we opened was actually a FIFO or other special file? Currently, the open filehandle just ends up being leaked leading to a dentry refcount mismatch and oops on umount."

From the Ubuntu Security Team

A flaw was discovered in the Linux kernel's cifs file system. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service.

Notes

AuthorNote
apw
currently sitting in the master branch of the tree below, waiting
on merge with linus:
git://git.samba.org/sfrench/cifs-2.6
see:
cifs: fix dentry refcount leak when opening a FIFO on lookup
now upstream (see below)

Priority

Low

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
hardy Not vulnerable

lucid
Released (2.6.32-41.88)
maverick Ignored
(end of life)
natty
Released (2.6.38-15.59)
oneiric
Released (3.0.0-18.31)
precise Not vulnerable
(3.2.0-19.30)
quantal Not vulnerable
(3.4.0-1.1)
raring Not vulnerable
(3.7.0-0.5)
saucy Not vulnerable
(3.9.0-0.2)
trusty Not vulnerable
(3.11.0-12.19)
utopic Not vulnerable
(3.13.0-24.46)
vivid Not vulnerable
(3.16.0-23.31)
wily Not vulnerable
(3.19.0-15.15)
xenial Not vulnerable
(4.2.0-16.19)
yakkety Not vulnerable
(4.4.0-21.37)
zesty Not vulnerable
(4.8.0-22.24)
upstream
Released (3.3~rc7)
Patches:
Introduced by

8db14ca12569fe885694bd3d5ff84c2d973d3cb0

Fixed by 5bccda0ebc7c0331b81ac47d39e4b920b198b2cd
linux-ec2
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (2.6.32-345.47)
maverick Ignored
(end of life)
natty Does not exist

oneiric Does not exist

precise Does not exist

quantal Does not exist

raring Does not exist

saucy Does not exist

trusty Does not exist

utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (3.3~rc7)
linux-mvl-dove
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Ignored
(end of life)
natty Does not exist

maverick Ignored
(end of life, was pending)
oneiric Does not exist

precise Does not exist

quantal Does not exist

raring Does not exist

saucy Does not exist

trusty Does not exist

upstream
Released (3.3~rc7)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-armadaxp
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Does not exist

natty Does not exist

oneiric Does not exist

precise Not vulnerable
(3.2.0-1601.4)
quantal Not vulnerable
(3.2.0-1601.4)
raring Does not exist

saucy Does not exist

trusty Does not exist

upstream
Released (3.3~rc7)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Not vulnerable
(4.4.0-1002.2)
upstream
Released (3.3~rc7)
xenial Not vulnerable
(4.4.0-1001.10)
yakkety Does not exist

zesty Does not exist

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

precise Does not exist

quantal Does not exist

saucy Does not exist

trusty Does not exist
(trusty was not-affected [3.4.0-1.3])
upstream
Released (3.3~rc7)
utopic Not vulnerable
(3.4.0-3.10)
vivid Not vulnerable
(3.4.0-3.15)
wily Not vulnerable
(3.4.0-4.18)
xenial Not vulnerable
(3.4.0-5.22)
yakkety Not vulnerable
(3.4.0-3.15)
zesty Does not exist

linux-fsl-imx51
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Ignored
(end of life)
maverick Does not exist

natty Does not exist

oneiric Does not exist

precise Does not exist

quantal Does not exist

raring Does not exist

saucy Does not exist

trusty Does not exist

upstream
Released (3.3~rc7)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Does not exist

upstream
Released (3.3~rc7)
xenial Not vulnerable
(4.4.0-1003.3)
yakkety Does not exist

zesty Does not exist

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

precise Does not exist

quantal Does not exist

saucy Ignored

trusty Does not exist
(trusty was not-affected [3.4.0-1.9])
upstream
Released (3.3~rc7)
utopic Not vulnerable
(3.4.0-3.14)
vivid Not vulnerable
(3.4.0-4.23)
wily Not vulnerable
(3.4.0-4.24)
xenial Not vulnerable
(3.4.0-4.27)
yakkety Not vulnerable
(3.4.0-4.27)
zesty Not vulnerable
(3.4.0-4.27)
linux-grouper
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Does not exist

quantal Does not exist

saucy Ignored

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (3.3~rc7)
utopic Ignored
(end of life)
vivid Does not exist

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 (3.3~rc7)
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 (3.3~rc7)
xenial Not vulnerable
(4.8.0-36.36~16.04.1)
yakkety Does not exist

zesty Does not exist

linux-lts-backport-maverick
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Ignored
(end of life)
maverick Does not exist

natty Does not exist

oneiric Does not exist

precise Does not exist

quantal Does not exist

raring Does not exist

saucy Does not exist

trusty Does not exist

upstream
Released (3.3~rc7)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-backport-natty
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (2.6.38-15.59~lucid1)
maverick Does not exist

natty Does not exist

oneiric Does not exist

precise Does not exist

quantal Does not exist

raring Does not exist

saucy Does not exist

trusty Does not exist

upstream
Released (3.3~rc7)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-backport-oneiric
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (3.0.0-18.31~lucid1)
maverick Does not exist

natty Does not exist

oneiric Does not exist

precise Does not exist

quantal Does not exist

raring Does not exist

saucy Does not exist

trusty Does not exist

upstream
Released (3.3~rc7)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

lucid Does not exist

oneiric Does not exist

precise Not vulnerable
(3.5.0-18.29~precise1)
quantal Does not exist

raring Does not exist

saucy Does not exist

trusty Does not exist

upstream
Released (3.3~rc7)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-raring
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Does not exist

oneiric Does not exist

precise Not vulnerable
(3.8.0-19.30~precise1)
quantal Does not exist

raring Does not exist

saucy Does not exist

trusty Does not exist

upstream
Released (3.3~rc7)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-trusty
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Not vulnerable
(3.13.0-24.46~precise1)
saucy Does not exist

trusty Does not exist

upstream
Released (3.3~rc7)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

precise Does not exist

trusty Does not exist
(trusty was not-affected [3.16.0-25.33~14.04.2])
upstream
Released (3.3~rc7)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

precise Does not exist

trusty Does not exist
(trusty was not-affected [3.19.0-18.18~14.04.1])
upstream
Released (3.3~rc7)
utopic Does not exist

vivid Does not exist

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 not-affected [4.2.0-18.22~14.04.1])
upstream
Released (3.3~rc7)
vivid Does not exist

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 Not vulnerable
(4.4.0-13.29~14.04.1)
upstream
Released (3.3~rc7)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

precise Does not exist

quantal Does not exist

saucy Ignored

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (3.3~rc7)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

precise Does not exist

quantal Does not exist

saucy Ignored

trusty Does not exist
(trusty was not-affected [3.4.0-3.21])
upstream
Released (3.3~rc7)
utopic Not vulnerable
(3.4.0-5.28)
vivid Not vulnerable
(3.4.0-5.34)
wily Not vulnerable
(3.4.0-6.37)
xenial Not vulnerable
(3.4.0-7.40)
yakkety Not vulnerable
(3.4.0-5.34)
zesty Does not exist

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

precise Does not exist

quantal Does not exist

saucy Ignored

trusty Does not exist
(trusty was not-affected [3.4.0-4.19])
upstream
Released (3.3~rc7)
utopic Not vulnerable
(3.4.0-6.25)
vivid Not vulnerable
(3.4.0-6.29)
wily Not vulnerable
(3.4.0-7.32)
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 (3.3~rc7)
vivid Does not exist

wily Not vulnerable
(4.2.0-1008.12)
xenial Not vulnerable
(4.2.0-1013.19)
yakkety Not vulnerable
(4.4.0-1009.10)
zesty Not vulnerable
(4.8.0-1013.15)
linux-snapdragon
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist

upstream
Released (3.3~rc7)
wily Does not exist

xenial Not vulnerable
(4.4.0-1012.12)
yakkety Not vulnerable
(4.4.0-1012.12)
zesty Not vulnerable
(4.4.0-1029.32)
linux-ti-omap4
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Does not exist

maverick Ignored
(end of life)
natty
Released (2.6.38-1209.24)
oneiric
Released (3.0.0-1208.19)
precise Not vulnerable
(3.2.0-1412.15)
quantal Not vulnerable
(3.2.0-1410.13)
raring Not vulnerable
(3.2.0-1410.13)
saucy Not vulnerable
(3.5.0-223.34)
trusty Does not exist

upstream
Released (3.3~rc7)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety 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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H