Vulnerability CVE-2011-1771
Published: 2011-09-06   Modified: 2012-02-13

Description:
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.

See advisories in our WLB2 database:
Topic
Author
Date
Low
linux kernel 2.6.38 related to O_DIRECT crash
Ben Greear
07.09.2011

Type:

CWE-Other

CVSS2 => (AV:L/AC:M/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.7/10
6.9/10
3.4/10
Exploit range
Attack complexity
Authentication
Local
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Linux -> Kernel 

 References:
https://bugzilla.redhat.com/show_bug.cgi?id=703016
http://www.openwall.com/lists/oss-security/2011/05/09/2
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7797069305d13252fd66cf722aa8f2cbeb3c95cd
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
http://securityreason.com/securityalert/8367
http://marc.info/?l=linux-cifs&m=130204730006155&w=2
http://marc.info/?l=linux-cifs&m=130204357001849&w=2
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