VDB-92515 · CVE-2015-8950 · BID 93318

Linux Kernel up to 4.0.2 dma-mapping.c dma_mmap Kernel Memory information disclosure

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.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.0.2 and classified as problematic. Affected by this issue is the function dma_mmap of the file arch/arm64/mm/dma-mapping.c. The manipulation leads to information disclosure (Kernel Memory). This vulnerability is handled as CVE-2015-8950. An attack has to be approached locally. There is no exploit available. It is recommended to upgrade the affected component. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 4.0.2 (Operating System) and classified as problematic. Affected by this vulnerability is the function dma_mmap of the file arch/arm64/mm/dma-mapping.c. The manipulation with an unknown input leads to a information disclosure vulnerability (Kernel Memory). 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/arm64/mm/dma-mapping.c in the Linux kernel before 4.0.3, as used in the ION subsystem in Android and other products, does not initialize certain data structures, which allows local users to obtain sensitive information from kernel memory by triggering a dma_mmap call.

The weakness was published 10/10/2016 (Website). It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2015-8950 since 08/11/2016. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. 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.

Upgrading to version 4.0.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 93318†). Similar entry is available at VDB-92517. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

Google Android

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

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

NVD Base Score: 🔍

Exploitinginfo

Name: Kernel Memory
Class: Information disclosure / Kernel Memory
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.0.3
Patch: git.kernel.org

Timelineinfo

08/11/2016 🔍
10/03/2016 +53 days 🔍
10/10/2016 +7 days 🔍
10/10/2016 +0 days 🔍
10/11/2016 +1 days 🔍
09/22/2022 +2172 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 6829e274a623187c24f7cfc0e3d35f25d087fcc5
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8950 (🔍)
GCVE (CVE): GCVE-0-2015-8950
GCVE (VulDB): GCVE-100-92515
SecurityFocus: 93318 - Linux Kernel CVE-2015-8950 Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 10/11/2016 10:05
Updated: 09/22/2022 17:25
Changes: 10/11/2016 10:05 (56), 05/06/2019 11:48 (12), 09/22/2022 17:25 (4)
Complete: 🔍
Cache ID: 216:0E8:103