Linux Kernel up to 4.3 fcntl64 System Call sys_oabi-compat.c access control

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.3. It has been rated as problematic. This affects an unknown part of the file arch/arm/kernel/sys_oabi-compat.c of the component fcntl64 System Call Handler. Performing a manipulation results in access control. This vulnerability is known as CVE-2015-8966. Attacking locally is a requirement. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.3 (Operating System). It has been classified as critical. This affects an unknown function of the file arch/arm/kernel/sys_oabi-compat.c of the component fcntl64 System Call Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

arch/arm/kernel/sys_oabi-compat.c in the Linux kernel before 4.4 allows local users to gain privileges via a crafted (1) F_OFD_GETLK, (2) F_OFD_SETLK, or (3) F_OFD_SETLKW command in an fcntl64 system call.

The bug was discovered 10/03/2016. The weakness was published 12/08/2016 (Website). It is possible to read the advisory at source.android.com. This vulnerability is uniquely identified as CVE-2015-8966 since 10/30/2016. The exploitability is told to be easy. Attacking locally is a requirement. The successful exploitation requires a authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 66 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 101928 (Ubuntu 14.04 LTS : linux vulnerabilities (USN-3360-1)), 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 196854 (Ubuntu Security Notification for Linux Vulnerabilities (USN-3360-1)).

Upgrading to version 4.4 eliminates this vulnerability. A possible mitigation has been published 9 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (101928) and SecurityFocus (BID 94673†). Similar entries are available at VDB-90537, VDB-92517, VDB-93965 and VDB-93976. 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: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
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: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 101928
Nessus Name: Ubuntu 14.04 LTS : linux vulnerabilities (USN-3360-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for linux USN-3360-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Kernel 4.4
Patch: git.kernel.org

Timelineinfo

10/03/2016 🔍
10/30/2016 +27 days 🔍
12/06/2016 +37 days 🔍
12/08/2016 +2 days 🔍
12/08/2016 +0 days 🔍
12/09/2016 +1 days 🔍
07/21/2017 +224 days 🔍
07/24/2017 +3 days 🔍
10/05/2022 +1899 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3360-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8966 (🔍)
GCVE (CVE): GCVE-0-2015-8966
GCVE (VulDB): GCVE-100-93975
SecurityFocus: 94673 - Linux Kernel CVE-2015-8966 Local Privilege Escalation Vulnerability

See also: 🔍

Entryinfo

Created: 12/09/2016 07:48
Updated: 10/05/2022 08:21
Changes: 12/09/2016 07:48 (70), 06/20/2019 14:55 (14), 10/05/2022 08:18 (4), 10/05/2022 08:21 (1)
Complete: 🔍
Cache ID: 216::103

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