Vulnerability CVE-2011-4110
Published: 2012-01-27   Modified: 2012-02-13

Description:
The user_update function in security/keys/user_defined.c in the Linux kernel 2.6 allows local users to cause a denial of service (NULL pointer dereference and kernel oops) via vectors related to a user-defined key and "updating a negative key into a fully instantiated key."

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

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.1/10
2.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Linux -> Kernel 
Linux -> Linux kernel 

 References:
http://marc.info/?l=bugtraq&m=139447903326211&w=2
http://www.openwall.com/lists/oss-security/2011/11/21/19
http://www.openwall.com/lists/oss-security/2011/11/22/5
http://www.openwall.com/lists/oss-security/2011/11/22/6
http://www.securityfocus.com/bid/50755
http://www.ubuntu.com/usn/USN-1324-1
http://www.ubuntu.com/usn/USN-1328-1
http://www.ubuntu.com/usn/USN-1344-1
https://bugzilla.redhat.com/show_bug.cgi?id=751297
https://lkml.org/lkml/2011/11/15/363
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