Linux Kernel up to 3.x Strict Page Permission arch/arm64/kernel/sys.c access control

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.6	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel up to 3.x. This vulnerability affects unknown code of the file arch/arm64/kernel/sys.c of the component Strict Page Permission Handler. Executing a manipulation can lead to access control. This vulnerability is handled as CVE-2015-8967. It is possible to launch the attack on the local host. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 3.x (Operating System). It has been declared as critical. This vulnerability affects an unknown functionality of the file arch/arm64/kernel/sys.c of the component Strict Page Permission Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

arch/arm64/kernel/sys.c in the Linux kernel before 4.0 allows local users to bypass the "strict page permissions" protection mechanism and modify the system-call table, and consequently gain privileges, by leveraging write access.

The bug was discovered 10/03/2016. The weakness was released 12/08/2016 (Website). The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2015-8967 since 10/30/2016. The attack needs to be approached locally. The successful exploitation needs a single authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability was handled as a non-public zero-day exploit for at least 66 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 101928 (Ubuntu 14.04 LTS : linux vulnerabilities (USN-3360-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196854 (Ubuntu Security Notification for Linux Vulnerabilities (USN-3360-1)).

Upgrading to version 4.0 eliminates this vulnerability. A possible mitigation has been published 9 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (101928) and SecurityFocus (BID 94680†). Entries connected to this vulnerability are available at VDB-90537, VDB-92517, VDB-93975 and VDB-102372. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 101928
Nessus Name: Ubuntu 14.04 LTS : linux vulnerabilities (USN-3360-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for linux USN-3360-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kernel 4.0
Patch: git.kernel.org

Timelineinfo

10/03/2016 🔍
10/30/2016 +27 days 🔍
12/06/2016 +37 days 🔍
12/08/2016 +2 days 🔍
12/08/2016 +0 days 🔍
12/09/2016 +1 days 🔍
07/21/2017 +224 days 🔍
07/24/2017 +3 days 🔍
10/05/2022 +1899 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3360-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8967 (🔍)
GCVE (CVE): GCVE-0-2015-8967
GCVE (VulDB): GCVE-100-93976
SecurityFocus: 94680 - Linux Kernel CVE-2015-8967 Local Privilege Escalation Vulnerability

See also: 🔍

Entryinfo

Created: 12/09/2016 07:48
Updated: 10/05/2022 08:27
Changes: 12/09/2016 07:48 (70), 06/20/2019 15:01 (14), 10/05/2022 08:25 (4), 10/05/2022 08:27 (1)
Complete: 🔍
Cache ID: 216:F4B:103

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