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CVE-2011-3191

Published: 25 August 2011

Integer signedness error in the CIFSFindNext function in fs/cifs/cifssmb.c in the Linux kernel before 3.1 allows remote CIFS servers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a large length value in a response to a read request for a directory.

From the Ubuntu Security Team

Darren Lavender discovered that the CIFS client incorrectly handled certain large values. A remote attacker with a malicious server could exploit this to crash the system or possibly execute arbitrary code as the root user.

Notes

AuthorNote
apw
patch title is as below in CIFS tree, likely SHA1 added below:
cifs: fix possible memory corruption in CIFSFindNext
kees
actual sha is below, old one from CIFS tree was
c32dfffaf59f73bbcf4472141b851a4dc5db2bf0
Priority

Medium

CVSS 3 base score: 8.8

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
hardy
Released (2.6.24-29.94)
lucid
Released (2.6.32-35.78)
maverick
Released (2.6.35-30.60)
natty
Released (2.6.38-12.51)
oneiric Not vulnerable
(3.0.0-11.18)
upstream
Released (3.1~rc7)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 9438fabb73eb48055b58b89fc51e0bc4db22fabd
linux-ec2
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (2.6.32-319.39)
maverick Ignored
(binary supplied by "linux" now)
natty Does not exist

oneiric Does not exist

upstream
Released (3.1~rc7)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (2.6.31-611.29)
maverick Does not exist

natty Does not exist

oneiric Does not exist

upstream
Released (3.1~rc7)
linux-lts-backport-maverick
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (2.6.35-30.60~lucid1)
maverick Does not exist

natty Does not exist

oneiric Does not exist

upstream
Released (3.1~rc7)
linux-lts-backport-natty
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (2.6.38-12.51~lucid1)
maverick Does not exist

natty Does not exist

oneiric Does not exist

upstream
Released (3.1~rc7)
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 (3.1~rc7)
linux-mvl-dove
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid
Released (2.6.32-219.37)
maverick
Released (2.6.32-419.37)
natty Does not exist

oneiric Does not exist

upstream
Released (3.1~rc7)
linux-ti-omap4
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Does not exist

maverick
Released (2.6.35-903.25)
natty
Released (2.6.38-1209.16)
oneiric Not vulnerable
(3.0.0-1205.10)
upstream
Released (3.1~rc7)