VDB-94699 · CVE-2016-9756 · BID 94615

Linux Kernel up to 4.8.11 Code Segment Initialization arch/x86/kvm/emulate.c information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

A vulnerability classified as problematic was found in Linux Kernel up to 4.8.11 (Operating System). Affected by this vulnerability is an unknown part of the file arch/x86/kvm/emulate.c of the component Code Segment Initialization. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

arch/x86/kvm/emulate.c in the Linux kernel before 4.8.12 does not properly initialize Code Segment (CS) in certain error cases, which allows local users to obtain sensitive information from kernel stack memory via a crafted application.

The bug was discovered 12/28/2016. The weakness was shared 12/28/2016 by Prasad J Pandit with Red Hat (Website). It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2016-9756 since 12/01/2016. Attacking locally is a requirement. A single authentication is necessary for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

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 276307 (Fedora Security Update for kernel (FEDORA-2016-bbe98c341c)).

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 vulnerability database at Tenable (95685). The entries 94698 and 94700 are related to this item.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
ATT&CK: T1592

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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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: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.8.12
Patch: git.kernel.org

Timelineinfo

12/01/2016 🔍
12/01/2016 +0 days 🔍
12/09/2016 +8 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
Organization: Red Hat
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-9756 (🔍)
SecurityFocus: 94615 - Linux Kernel 'kvm/emulate.c' Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 12/28/2016 16:11
Updated: 10/12/2022 19:56
Changes: 12/28/2016 16:11 (75), 07/20/2019 09:24 (8), 10/12/2022 19:48 (4), 10/12/2022 19:56 (1)
Complete: 🔍

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