Linux Kernel up to 4.4 USB Descriptor cdc_ncm.c double free

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7.0	$0-$5k	0.00

A vulnerability was found in Linux Kernel up to 4.4 (Operating System). It has been classified as critical. Affected is some unknown functionality of the file drivers/net/usb/cdc_ncm.c of the component USB Descriptor Handler. The manipulation with an unknown input leads to a double free vulnerability. CWE is classifying the issue as CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Double free vulnerability in drivers/net/usb/cdc_ncm.c in the Linux kernel before 4.5 allows physically proximate attackers to cause a denial of service (system crash) or possibly have unspecified other impact by inserting a USB device with an invalid USB descriptor.

The weakness was presented 05/02/2016 by Andrey Konovalov (Website). The advisory is shared for download at spinics.net. This vulnerability is traded as CVE-2016-3951 since 04/05/2016. The attack needs to be approached locally. A authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 91425 (Ubuntu 14.04 LTS : linux vulnerabilities (USN-2989-1)), 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 196463 (Ubuntu Security Notification for Linux Vulnerabilities (USN-2965-1)).

Upgrading to version 4.5 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (91425). See 81364, 81365, 81366 and 81378 for similar entries.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

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: 7.2
VulDB Meta Temp Score: 7.0

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.6
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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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: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
ATT&CK: Unknown

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: 91425
Nessus Name: Ubuntu 14.04 LTS : linux vulnerabilities (USN-2989-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 830125
OpenVAS Name: Ubuntu Update for linux-raspi2 USN-2965-3
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: 🔍
Exposure Time: 🔍

Upgrade: Kernel 4.5
Patch: git.kernel.org

Timelineinfo

03/04/2016 🔍
04/05/2016 +32 days 🔍
05/02/2016 +27 days 🔍
05/02/2016 +0 days 🔍
05/03/2016 +1 days 🔍
06/01/2016 +29 days 🔍
06/01/2016 +0 days 🔍
07/27/2022 +2247 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2989-1
Researcher: Andrey Konovalov
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-3951 (🔍)
OVAL: 🔍

SecurityTracker: 1036763
SecurityFocus: 91028 - Linux Kernel CVE-2016-3951 Null Pointer Deference Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 05/03/2016 11:26
Updated: 07/27/2022 20:10
Changes: 05/03/2016 11:26 (68), 11/10/2018 09:02 (16), 07/27/2022 20:10 (6)
Complete: 🔍