CVE-2016-9777

HIGH
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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

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

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

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to 4.8.11 (inclusive)

Tenable Plugins

View all (6 total)

IDNameProductFamilySeverity
124981EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1528)NessusHuawei Local Security Checks
high
97098Ubuntu 16.10 : linux-raspi2 vulnerabilities (USN-3190-2)NessusUbuntu Local Security Checks
critical
97018Ubuntu 16.10 : linux vulnerabilities (USN-3190-1)NessusUbuntu Local Security Checks
critical
95685Fedora 25 : kernel (2016-bbe98c341c)NessusFedora Local Security Checks
high
95680Fedora 23 : kernel (2016-9c17cb9648)NessusFedora Local Security Checks
high
95676Fedora 24 : kernel (2016-5ec2475e3f)NessusFedora Local Security Checks
high