CVE-2016-3713 Information

Description

The msr_mtrr_valid function in arch/x86/kvm/mtrr.c in the Linux kernel before 4.6.1 supports MSR 0x2f8 which allows guest OS users to read or write to the kvm_arch_vcpu data structure and consequently obtain sensitive information or cause a denial of service (system crash) via a crafted ioctl call.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9842df62004f366b9fed2423e24df10542ee0dc5 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.1 http://www.openwall.com/lists/oss-security/2016/05/16/2 https://bugzilla.redhat.com/show_bug.cgi?id=1332139 https://github.com/torvalds/linux/commit/9842df62004f366b9fed2423e24df10542ee0dc5

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.1