Linux Kernel up to 4.4.1 visor.c clie_5_attach null pointer dereference

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.
5.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 4.4.1. Affected by this issue is the function clie_5_attach of the file drivers/usb/serial/visor.c. The manipulation results in null pointer dereference. This vulnerability is identified as CVE-2015-7566. The attack is only possible with local access. Additionally, an exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 4.4.1 (Operating System). Affected is the function clie_5_attach of the file drivers/usb/serial/visor.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The clie_5_attach function in drivers/usb/serial/visor.c in the Linux kernel through 4.4.1 allows physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by inserting a USB device that lacks a bulk-out endpoint.

The weakness was released 02/08/2016 by Ralf Spenneberg with RCE Security (Website). The advisory is shared for download at security-tracker.debian.org. This vulnerability is traded as CVE-2015-7566 since 09/29/2015. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known.

A public exploit has been developed by OpenSource Security and been published 2 months after the advisory. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 87995 (Debian DSA-3448-1 : linux - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168771 (SUSE Enterprise Linux Security update for the Linux Kernel (SUSE-SU-2016:1203-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (39540), Tenable (87995), SecurityFocus (BID 82975†) and Vulnerability Center (SBV-56444†). Entries connected to this vulnerability are available at VDB-8569, VDB-78541, VDB-79223 and VDB-79228. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Website

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: 7.8
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.6
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: OpenSource Security
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 87995
Nessus Name: Debian DSA-3448-1 : linux - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703448
OpenVAS Name: Debian Security Advisory DSA 3448-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Patch: git.kernel.org

Timelineinfo

09/29/2015 🔍
01/18/2016 +112 days 🔍
01/19/2016 +1 days 🔍
01/19/2016 +0 days 🔍
02/06/2016 +18 days 🔍
02/07/2016 +0 days 🔍
02/08/2016 +1 days 🔍
02/08/2016 +0 days 🔍
02/08/2016 +0 days 🔍
03/08/2016 +29 days 🔍
03/08/2016 +0 days 🔍
11/05/2024 +3163 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2929-1
Researcher: Ralf Spenneberg
Organization: RCE Security
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-7566 (🔍)
GCVE (CVE): GCVE-0-2015-7566
GCVE (VulDB): GCVE-100-80796

OVAL: 🔍

SecurityFocus: 82975 - Linux Kernel 'drivers/usb/serial/visor.c' Local Denial of Service Vulnerability
Vulnerability Center: 56444 - Linux Kernel 4.4.1 and Earlier Local DoS and Other Unspecified Impact via a USB Device that Lacks a Bulk-Out Endpoint, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 02/08/2016 09:04
Updated: 11/05/2024 03:43
Changes: 02/08/2016 09:04 (71), 08/22/2018 09:40 (25), 07/07/2022 07:38 (4), 11/05/2024 03:43 (14)
Complete: 🔍
Cache ID: 216:5C7:103

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!