Linux Kernel 3.x/4.x aufs access control

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel 3.x/4.x. Impacted is an unknown function of the component aufs Module. This manipulation causes access control. This vulnerability appears as CVE-2016-2854. In addition, an exploit is available.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel 3.x/4.x (Operating System). Affected by this vulnerability is an unknown code of the component aufs Module. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The aufs module for the Linux kernel 3.x and 4.x does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.

The weakness was presented 05/02/2016 by halfdog with halfdog.net (Website). It is possible to read the advisory at sourceforge.net. This vulnerability is known as CVE-2016-2854 since 03/06/2016. Attacking locally is a requirement. A single authentication is needed for exploitation. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (41761) and SecurityFocus (BID 96838†). See VDB-83142 for similar entry. Be aware that VulDB is the high quality source 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: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/06/2016 🔍
05/02/2016 +57 days 🔍
05/02/2016 +0 days 🔍
05/03/2016 +1 days 🔍
02/05/2017 +278 days 🔍
10/31/2024 +2825 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: sourceforge.net
Researcher: halfdog
Organization: halfdog.net
Status: Not defined

CVE: CVE-2016-2854 (🔍)
GCVE (CVE): GCVE-0-2016-2854
GCVE (VulDB): GCVE-100-83143
SecurityFocus: 96838 - Linux Kernel CVE-2016-2854 Local Privilege Escalation Vulnerability

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

Entryinfo

Created: 05/03/2016 11:25
Updated: 10/31/2024 19:16
Changes: 05/03/2016 11:25 (59), 11/07/2018 16:34 (5), 10/31/2024 19:16 (27)
Complete: 🔍
Cache ID: 216:C6E:103

Be aware that VulDB is the high quality source for vulnerability data.

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