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Vulnerability Details : CVE-2011-4110

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."
Publish Date : 2012-01-27 Last Update Date : 2012-03-22
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- CVSS Scores & Vulnerability Types

CVSS Score
2.1
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 264

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat moderate
4.9
AV:L/AC:L/Au:N/C:N/I:N/A:C 2011-11-03 2011-11-15
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- Related OVAL Definitions

Title Definition Id Class Family
CVE-2011-4110 oval:org.opensuse.security:def:20114110 unix
DSA-2389-1 linux-2.6 -- privilege escalation/denial of service/information leak oval:org.mitre.oval:def:15414 unix
ELSA-2011:1479: kernel security, bug fix, and enhancement update (Important) oval:org.mitre.oval:def:23202 unix
RHSA-2011:1479: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20111479 unix
RHSA-2011:1479: kernel security, bug fix, and enhancement update (Important) oval:org.mitre.oval:def:22198 unix
VMware vSphere and vCOps updates to third party libraries oval:org.mitre.oval:def:20706 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2011-4110

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel 2.6 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1

- References For CVE-2011-4110

http://secunia.com/advisories/47754
SECUNIA 47754
http://www.openwall.com/lists/oss-security/2011/11/22/6
MLIST [oss-security] 20111121 Re: CVE-2011-4110 kernel: keys: NULL pointer deref in the user-defined key type
http://www.openwall.com/lists/oss-security/2011/11/22/5
MLIST [oss-security] 20111122 Re: CVE-2011-4110 kernel: keys: NULL pointer deref in the user-defined key type
http://www.openwall.com/lists/oss-security/2011/11/21/19
MLIST [oss-security] 20111121 CVE-2011-4110 kernel: keys: NULL pointer deref in the user-defined key type
http://www.securityfocus.com/bid/50755
BID 50755 Linux Kernel CVE-2011-4110 NULL Pointer Dereference Denial of Service Vulnerability Release Date:2014-03-28
http://www.ubuntu.com/usn/USN-1324-1
UBUNTU USN-1324-1
http://www.ubuntu.com/usn/USN-1328-1
UBUNTU USN-1328-1
https://lkml.org/lkml/2011/11/15/363
MLIST [linux-kernel] 20111115 [PATCH] KEYS: Fix a NULL pointer deref in the user-defined key type
http://www.ubuntu.com/usn/USN-1344-1
UBUNTU USN-1344-1
https://bugzilla.redhat.com/show_bug.cgi?id=751297 CONFIRM

- Metasploit Modules Related To CVE-2011-4110

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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