Google Android Kernel ext4 File System Permanent race condition

CVSS Meta Temp Score
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Google Android. The impacted element is an unknown function of the component Kernel ext4 File System. Performing a manipulation results in race condition (Permanent). This vulnerability is identified as CVE-2015-8839. The attack is only possible with local access. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Google Android (Smartphone Operating System) (version now known). This affects some unknown processing of the component Kernel ext4 File System. The manipulation with an unknown input leads to a race condition vulnerability (Permanent). CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. This is going to have an impact on availability.

The weakness was released 09/06/2016 as Android Security Bulletin - September 2016 as confirmed security bulletin (Website). The advisory is shared at source.android.com. This vulnerability is uniquely identified as CVE-2015-8839 since 04/01/2016. An attack has to be approached locally. Required for exploitation is a authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 90952 (Fedora 22 : kernel-4.4.8-200.fc22 (2016-373c063e79)), 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 276048 (Fedora Security Update for kernel (FEDORA-2016-8e858f96b8)).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (90952) and SecurityFocus (BID 85798†). Entries connected to this vulnerability are available at VDB-81564, VDB-82462, VDB-91415 and VDB-91416. 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: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.1
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.1
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: Permanent
Class: Race condition / Permanent
CWE: CWE-362
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: 90952
Nessus Name: Fedora 22 : kernel-4.4.8-200.fc22 (2016-373c063e79)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: alas-2016-703
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍

Patch: git.kernel.org

Timelineinfo

04/01/2016 🔍
04/01/2016 +0 days 🔍
05/02/2016 +30 days 🔍
05/09/2016 +7 days 🔍
09/06/2016 +120 days 🔍
09/06/2016 +0 days 🔍
09/11/2016 +5 days 🔍
09/15/2022 +2195 days 🔍

Sourcesinfo

Vendor: google.com

Advisory: Android Security Bulletin - September 2016
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-8839 (🔍)
GCVE (CVE): GCVE-0-2015-8839
GCVE (VulDB): GCVE-100-91461
SecurityFocus: 85798 - Linux Kernel CVE-2015-8839 Local Security Bypass Vulnerability
SecurityTracker: 1035455

scip Labs: https://www.scip.ch/en/?labs.20150917
See also: 🔍

Entryinfo

Created: 09/11/2016 12:29
Updated: 09/15/2022 15:53
Changes: 09/11/2016 12:29 (68), 04/14/2019 10:45 (12), 09/15/2022 15:47 (6), 09/15/2022 15:53 (1)
Complete: 🔍
Cache ID: 216:B90:103

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