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CVE-2011-1771

Published: 6 September 2011

The cifs_close function in fs/cifs/file.c in the Linux kernel before 2.6.39 allows local users to cause a denial of service (NULL pointer dereference and BUG) or possibly have unspecified other impact by setting the O_DIRECT flag during an attempt to open a file on a CIFS filesystem.

From the Ubuntu Security Team

Ben Greear discovered that CIFS did not correctly handle direct I/O. A local attacker with access to a CIFS partition could exploit this to crash the system, leading to a denial of service.

Priority

Medium

CVSS 3 base score: 7.8

Status

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

lucid Not vulnerable

maverick Not vulnerable

natty
Released (2.6.38-9.43)
oneiric Not vulnerable
(2.6.39-0.4)
upstream
Released (2.6.39~rc4)
Patches:
Introduced by

cdff08e76612e53580139653403aedea979aa639

Fixed by 7797069305d13252fd66cf722aa8f2cbeb3c95cd
linux-ec2
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Not vulnerable

maverick Ignored
(binary supplied by "linux" now)
natty Does not exist

oneiric Does not exist

upstream
Released (2.6.39~rc4)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Not vulnerable

maverick Does not exist

natty Does not exist

oneiric Does not exist

upstream
Released (2.6.39~rc4)
linux-lts-backport-maverick
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Not vulnerable

maverick Does not exist

natty Does not exist

oneiric Does not exist

upstream
Released (2.6.39~rc4)
linux-lts-backport-natty
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (2.6.38-9.43~lucid1)
maverick Does not exist

natty Does not exist

oneiric Does not exist

upstream
Released (2.6.39~rc4)
linux-lts-backport-oneiric
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Not vulnerable

maverick Does not exist

natty Does not exist

oneiric Does not exist

upstream
Released (2.6.39~rc4)
linux-mvl-dove
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Not vulnerable

maverick Not vulnerable

natty Does not exist

oneiric Does not exist

upstream
Released (2.6.39~rc4)
linux-ti-omap4
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Does not exist

maverick Not vulnerable

natty
Released (2.6.38-1209.13)
oneiric Not vulnerable
(2.6.38-1309.13)
upstream
Released (2.6.39~rc4)