Linux Kernel up to 4.5.0 USB Descriptor digi_acceleport.c digi_port_init null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 4.5.0. This impacts the function digi_port_init of the file drivers/usb/serial/digi_acceleport.c of the component USB Descriptor Handler. The manipulation leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2016-3140. Local access is required to approach this attack. Moreover, an exploit is present. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.5.0 (Operating System) and classified as critical. This issue affects the function digi_port_init of the file drivers/usb/serial/digi_acceleport.c of the component USB Descriptor Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The digi_port_init function in drivers/usb/serial/digi_acceleport.c in the Linux kernel before 4.5.1 allows physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor.

The weakness was disclosed 05/02/2016 by Ralf Spenneberg (Website). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2016-3140 since 03/13/2016. Attacking locally is a requirement. The successful exploitation needs a simple authentication. Technical details as well as a public exploit are known.

A public exploit has been developed by OpenSource Security and been published even before and not after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 24 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 90330 (Fedora 24 : kernel-4.5.0-302.fc24 (2016-81fd1b03aa)), 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 196463 (Ubuntu Security Notification for Linux Vulnerabilities (USN-2965-1)).

Upgrading to version 4.5.1 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 (39537), Tenable (90330) and SecurityFocus (BID 84304†). The entries VDB-81364, VDB-81365, VDB-81366 and VDB-81378 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.1

VulDB Base Score: 8.4
VulDB Temp Score: 7.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.6
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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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: 🔍

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Nessus ID: 90330
Nessus Name: Fedora 24 : kernel-4.5.0-302.fc24 (2016-81fd1b03aa)
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: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.5.1
Patch: git.kernel.org

Timelineinfo

03/04/2016 🔍
03/09/2016 +5 days 🔍
03/09/2016 +0 days 🔍
03/13/2016 +4 days 🔍
04/02/2016 +20 days 🔍
04/05/2016 +3 days 🔍
05/02/2016 +27 days 🔍
05/02/2016 +0 days 🔍
05/03/2016 +1 days 🔍
10/07/2024 +3079 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2016-81fd1b03aa
Researcher: Ralf Spenneberg
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-3140 (🔍)
GCVE (CVE): GCVE-0-2016-3140
GCVE (VulDB): GCVE-100-83147

OVAL: 🔍

SecurityFocus: 84304 - Linux Kernel 'digi_acceleport.c' Local Denial of Service Vulnerability

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

Entryinfo

Created: 05/03/2016 11:26
Updated: 10/07/2024 02:30
Changes: 05/03/2016 11:26 (70), 11/07/2018 16:36 (21), 07/27/2022 19:54 (4), 07/27/2022 20:02 (1), 10/07/2024 02:30 (14)
Complete: 🔍
Cache ID: 216::103

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