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
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 |
||
|
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)
|
|
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 |