CVE-2016-9777

MEDIUM

Description

KVM in the Linux kernel before 4.8.12, when I/O APIC is enabled, does not properly restrict the VCPU index, which allows guest OS users to gain host OS privileges or cause a denial of service (out-of-bounds array access and host OS crash) via a crafted interrupt request, related to arch/x86/kvm/ioapic.c and arch/x86/kvm/ioapic.h.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.12

http://www.openwall.com/lists/oss-security/2016/12/02/2

http://www.securityfocus.com/bid/94640

https://bugzilla.redhat.com/show_bug.cgi?id=1400804

https://github.com/torvalds/linux/commit/81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755

Details

Source: MITRE

Published: 2016-12-28

Updated: 2016-12-31

Type: CWE-125

Risk Information

CVSS v2.0

Base Score: 6.9

Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3.0

Base Score: 7.8

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

Impact Score: 6

Exploitability Score: 1.1

Severity: HIGH