Linux Kernel up to 4.8.11 KVM out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.8.11 and classified as critical. Affected by this issue is some unknown functionality of the component KVM. Such manipulation leads to out-of-bounds. This vulnerability is referenced as CVE-2016-9777. The attack can only be performed from a local environment. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 4.8.11 (Operating System). Affected by this issue is an unknown code of the component KVM. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 12/28/2016. The weakness was published 12/28/2016 by Prasad J Pandit (Website). The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2016-9777 since 12/02/2016. The attack needs to be approached locally. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 95685 (Fedora 25 : kernel (2016-bbe98c341c)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196686 (Ubuntu Security Notification for Linux Vulnerabilities (USN-3190-1)).

Upgrading to version 4.8.12 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (95685) and SecurityFocus (BID 94640†). Similar entries are available at VDB-94698, VDB-94699, VDB-95259 and VDB-96552. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 95685
Nessus Name: Fedora 25 : kernel (2016-bbe98c341c)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 55807
OpenVAS Name: Fedora Update for kernel FEDORA-2016-5ec2475e3f
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.8.12
Patch: git.kernel.org

Timelineinfo

12/02/2016 🔍
12/02/2016 +0 days 🔍
12/09/2016 +7 days 🔍
12/12/2016 +3 days 🔍
12/28/2016 +16 days 🔍
12/28/2016 +0 days 🔍
12/28/2016 +0 days 🔍
12/28/2016 +0 days 🔍
10/12/2022 +2114 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2016-bbe98c341c
Researcher: Prasad J Pandit
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-9777 (🔍)
GCVE (CVE): GCVE-0-2016-9777
GCVE (VulDB): GCVE-100-94700
SecurityFocus: 94640 - Linux Kernel 'lapic.c' Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 12/28/2016 16:11
Updated: 10/12/2022 20:18
Changes: 12/28/2016 16:11 (55), 07/20/2019 09:25 (18), 10/12/2022 20:02 (4), 10/12/2022 20:10 (11), 10/12/2022 20:18 (1)
Complete: 🔍
Cache ID: 216:D39:103

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