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.
6.0	$0-$5k	0.00

A vulnerability was found in Linux Kernel up to 4.6.0 (Operating System). It has been classified as critical. This affects the function vop_ioctl of the file drivers/misc/mic/vop/vop_vringh.c of the component MIC VOP Driver. The manipulation with an unknown input leads to a memory corruption vulnerability (Stored). CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Race condition in the vop_ioctl function in drivers/misc/mic/vop/vop_vringh.c in the MIC VOP driver in the Linux kernel before 4.6.1 allows local users to obtain sensitive information from kernel memory or cause a denial of service (memory corruption and system crash) by changing a certain header, aka a "double fetch" vulnerability.

The weakness was disclosed 06/27/2016 as Bug 116651 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.kernel.org. This vulnerability is uniquely identified as CVE-2016-5728 since 06/21/2016. An attack has to be approached locally. A authentication is required for exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 92232 (Fedora 24 : kernel (2016-1c409313f4)), 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 196569 (Ubuntu Security Notification for Linux Vulnerabilities (USN-3071-1)).

Upgrading to version 4.6.1 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published even before and not after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

if (memcmp(&dd, dd_config, sizeof(dd))) {
        ret = -EINVAL;
        goto free_ret;
}

The bug report contains the following remark:

Ensure desc has not changed between the two reads

The vulnerability is also documented in the vulnerability database at Tenable (92232). The entry 88374 is pretty similar.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.3
NVD Vector: 🔍

CVSSv2info

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

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Name: Stored
Class: Memory corruption / Stored
CWE: CWE-119
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

Nessus ID: 92232
Nessus Name: Fedora 24 : kernel (2016-1c409313f4)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53829
OpenVAS Name: Ubuntu Update for linux-snapdragon USN-3070-3
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: 🔍

Upgrade: Kernel 4.6.1
Patch: github.com

Timelineinfo

04/18/2016 🔍
04/27/2016 +9 days 🔍
06/21/2016 +55 days 🔍
06/27/2016 +6 days 🔍
06/27/2016 +0 days 🔍
06/29/2016 +2 days 🔍
07/15/2016 +16 days 🔍
02/17/2019 +947 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 116651
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-5728 (🔍)
OVAL: 🔍
See also: 🔍

Entryinfo

Created: 06/29/2016 11:21
Updated: 02/17/2019 10:46
Changes: 06/29/2016 11:21 (77), 02/17/2019 10:46 (10)
Complete: 🔍

Discussion

Might our Artificial Intelligence support you?

Check our Alexa App!