Linux Kernel up to 4.5.2 overlayfs access control

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.5.2. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component overlayfs. Such manipulation leads to access control. This vulnerability is listed as CVE-2016-1576. The attack must be carried out locally. In addition, an exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.5.2 (Operating System) and classified as critical. Affected by this issue is some unknown processing of the component overlayfs. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The overlayfs implementation in the Linux kernel through 4.5.2 does not properly restrict the mount namespace, which allows local users to gain privileges by mounting an overlayfs filesystem on top of a FUSE filesystem, and then executing a crafted setuid program.

The weakness was presented 05/02/2016 (Website). The advisory is available at launchpadlibrarian.net. This vulnerability is handled as CVE-2016-1576. Local access is required to approach this attack. Required for exploitation is a simple authentication. Technical details are unknown but a public exploit is available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 88895 (Ubuntu 14.04 LTS : linux vulnerabilities (USN-2907-1)), 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 196406 (Ubuntu Security Notification for Linux-lts-utopic Vulnerabilities (USN-2909-1)).

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 (41763) and Tenable (88895). See VDB-83137 for similar entry. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.4

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

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 88895
Nessus Name: Ubuntu 14.04 LTS : linux vulnerabilities (USN-2907-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 864193
OpenVAS Name: Ubuntu Update for linux USN-2907-1
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: 🔍

Patch: git.kernel.org

Timelineinfo

01/12/2016 🔍
02/22/2016 +41 days 🔍
02/23/2016 +1 days 🔍
05/02/2016 +69 days 🔍
05/02/2016 +0 days 🔍
05/03/2016 +1 days 🔍
11/30/2024 +3133 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2907-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-1576 (🔍)
GCVE (CVE): GCVE-0-2016-1576
GCVE (VulDB): GCVE-100-83138
scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 05/03/2016 11:24
Updated: 11/30/2024 08:51
Changes: 05/03/2016 11:24 (62), 11/07/2018 16:32 (11), 07/27/2022 18:07 (4), 07/27/2022 18:15 (1), 11/30/2024 08:51 (25)
Complete: 🔍
Cache ID: 216:064:103

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