Vulnerability CVE-2013-0313
Published: 2013-02-21   Modified: 2013-02-22

Description:
The evm_update_evmxattr function in security/integrity/evm/evm_crypto.c in the Linux kernel before 3.7.5, when the Extended Verification Module (EVM) is enabled, allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via an attempted removexattr operation on an inode of a sockfs filesystem.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Linux Kernel 3.7.4 evm NULL pointer dereference
P J P
22.02.2013

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

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.2/10
10/10
1.9/10
Exploit range
Attack complexity
Authentication
Local
High
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Linux -> Linux kernel 

 References:
https://github.com/torvalds/linux/commit/a67adb997419fb53540d4a4f79c6471c60bc69b6
https://bugzilla.redhat.com/show_bug.cgi?id=913266
http://www.openwall.com/lists/oss-security/2013/02/20/16
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.7.5
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a67adb997419fb53540d4a4f79c6471c60bc69b6
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