Linux Kernel up to 4.6 cros_ec_dev.c ec_device_ioctl_xcmd race condition

CVSS Meta Temp Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 4.6 and classified as problematic. This affects the function ec_device_ioctl_xcmd of the file drivers/platform/chrome/cros_ec_dev.c. The manipulation leads to race condition. This vulnerability is listed as CVE-2016-6156. The attack must be carried out locally. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.6 (Operating System) and classified as problematic. This issue affects the function ec_device_ioctl_xcmd of the file drivers/platform/chrome/cros_ec_dev.c. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Race condition in the ec_device_ioctl_xcmd function in drivers/platform/chrome/cros_ec_dev.c in the Linux kernel before 4.7 allows local users to cause a denial of service (out-of-bounds array access) by changing a certain size value, aka a "double fetch" vulnerability.

The weakness was presented 08/06/2016 (Website). The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2016-6156 since 07/01/2016. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 92446 (Fedora 24 : kernel (2016-9a16b2e14e)), 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 196581 (Ubuntu Security Notification for Linux Vulnerabilities (USN-3084-1)).

Upgrading to version 4.7 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (92446) and SecurityFocus (BID 91553†). See VDB-90657, VDB-90656, VDB-90655 and VDB-90654 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.1
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.1
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Race condition
CWE: CWE-362
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: 92446
Nessus Name: Fedora 24 : kernel (2016-9a16b2e14e)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867101
OpenVAS Name: Fedora Update for kernel FEDORA-2016-784d5526d8
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 4.7
Patch: git.kernel.org

Timelineinfo

07/01/2016 🔍
07/04/2016 +3 days 🔍
07/19/2016 +15 days 🔍
07/20/2016 +1 days 🔍
08/06/2016 +17 days 🔍
08/06/2016 +0 days 🔍
08/08/2016 +2 days 🔍
09/13/2022 +2227 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 096cdc6f52225835ff503f987a0d68ef770bb78e
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-6156 (🔍)
GCVE (CVE): GCVE-0-2016-6156
GCVE (VulDB): GCVE-100-90653
SecurityFocus: 91553 - Linux Kernel CVE-2016-6156 Local Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 08/08/2016 15:26
Updated: 09/13/2022 09:54
Changes: 08/08/2016 15:26 (67), 03/22/2019 10:02 (14), 09/13/2022 09:54 (5)
Complete: 🔍
Cache ID: 216::103

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