VDB-154697 · CVE-2020-12114 · GCVE-0-2020-12114

Linux Kernel up to 5.2 Reference Counter fs/namespace.c pivot_root race condition

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3.8	$0-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 4.4.220/4.9.220/4.14.177/4.19.118/5.2. This issue affects the function pivot_root of the file fs/namespace.c of the component Reference Counter. The manipulation leads to race condition. This vulnerability is uniquely identified as CVE-2020-12114. Local access is required to approach this attack. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.4.220/4.9.220/4.14.177/4.19.118/5.2 (Operating System) and classified as problematic. This issue affects the function pivot_root of the file fs/namespace.c of the component Reference Counter. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. The summary by CVE is:

A pivot_root race condition in fs/namespace.c in the Linux kernel 4.4.x before 4.4.221, 4.9.x before 4.9.221, 4.14.x before 4.14.178, 4.19.x before 4.19.119, and 5.x before 5.3 allows local users to cause a denial of service (panic) by corrupting a mountpoint reference counter.

The weakness was disclosed 05/04/2020. The identification of this vulnerability is CVE-2020-12114 since 04/23/2020. An attack has to be approached locally. A simple authentication is needed for exploitation. Technical details are known, but no exploit is available.

Upgrading to version 4.4.221, 4.9.221, 4.14.178, 4.19.119 or 5.3 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.9

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Race condition
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.4.221/4.9.221/4.14.178/4.19.119/5.3

Timelineinfo

04/23/2020 🔍
05/04/2020 +11 days 🔍
05/04/2020 +0 days 🔍
10/15/2020 +164 days 🔍

Sourcesinfo

Vendor: kernel.org

Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-12114 (🔍)
GCVE (CVE): GCVE-0-2020-12114
GCVE (VulDB): GCVE-100-154697

Entryinfo

Created: 05/04/2020 17:02
Updated: 10/15/2020 07:54
Changes: 05/04/2020 17:02 (40), 05/04/2020 17:07 (18), 10/15/2020 07:54 (1)
Complete: 🔍
Cache ID: 216::103