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5.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Linux Kernel and classified as problematic. The affected element is the function proc_connectinfo of the file drivers/usb/core/devio.c. The manipulation results in information disclosure. This vulnerability is identified as CVE-2016-4482. The attack is only possible with local access. There is not any exploit available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in Linux Kernel (Operating System) (the affected version is unknown). It has been classified as problematic. Affected is the function proc_connectinfo of the file drivers/usb/core/devio.c. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality.

The weakness was released 05/04/2016 as confirmed mailinglist post (oss-sec). The advisory is available at seclists.org. This vulnerability is traded as CVE-2016-4482 since 05/04/2016. The exploitability is told to be easy. Local access is required to approach this attack. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project. The reason for this vulnerability is this part of code:

struct usbdevfs_connectinfo ci = {
   .devnum = ps->dev->devnum,
   .slow = ps->dev->speed == USB_SPEED_LOW
};

The vulnerability scanner Nessus provides a plugin with the ID 90955 (Fedora 24 : kernel-4.5.3-300.fc24 (2016-4ce97823af)), 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 168927 (OpenSuSE Security Update for the Linux Kernel (openSUSE-SU-2016:1641-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published 4 days after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

struct usbdevfs_connectinfo ci;

memset(&ci, 0, sizeof(ci));
ci.devnum = ps->dev->devnum;
ci.slow = ps->dev->speed == USB_SPEED_LOW;

The vulnerability is also documented in the databases at X-Force (112916), Tenable (90955) and SecurityFocus (BID 90029†). Entries connected to this vulnerability are available at VDB-83139, VDB-87304, VDB-87608 and VDB-87611. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

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: 6.2
VulDB Meta Temp Score: 5.8

VulDB Base Score: 6.2
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.2
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

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

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 90955
Nessus Name: Fedora 24 : kernel-4.5.3-300.fc24 (2016-4ce97823af)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 863099
OpenVAS Name: Fedora Update for kernel FEDORA-2016-4
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: git.kernel.org

Timelineinfo

05/03/2016 🔍
05/04/2016 +1 days 🔍
05/04/2016 +0 days 🔍
05/08/2016 +4 days 🔍
05/09/2016 +1 days 🔍
05/10/2016 +1 days 🔍
05/23/2016 +13 days 🔍
08/17/2022 +2277 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3016-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-4482 (🔍)
GCVE (CVE): GCVE-0-2016-4482
GCVE (VulDB): GCVE-100-87126

OVAL: 🔍

X-Force: 112916 - Linux Kernel drivers/usb/core/devio.c information disclosure
SecurityFocus: 90029 - Linux Kernel CVE-2016-4482 Local Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 05/10/2016 10:34
Updated: 08/17/2022 23:06
Changes: 05/10/2016 10:34 (73), 11/23/2018 10:45 (14), 08/17/2022 23:06 (4)
Complete: 🔍
Cache ID: 216:C2C:103

Discussion

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