Linux Kernel Memory Deduplication information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel. The affected element is an unknown function of the component Memory Deduplication Handler. Such manipulation leads to information disclosure. This vulnerability is documented as CVE-2021-3714. The attack can be executed remotely. There is not any exploit available. Modifying the configuration settings is advised.

Detailsinfo

A vulnerability was found in Linux Kernel (Operating System) (affected version unknown). It has been rated as problematic. Affected by this issue is an unknown functionality of the component Memory Deduplication Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

A flaw was found in the Linux kernels memory deduplication mechanism. Previous work has shown that memory deduplication can be attacked via a local exploitation mechanism. The same technique can be used if an attacker can upload page sized files and detect the change in access time from a networked service to determine if the page has been merged.

The weakness was released 08/24/2022. The advisory is available at access.redhat.com. This vulnerability is handled as CVE-2021-3714 since 08/18/2021. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

It is possible to mitigate the problem by applying the configuration setting Deactivation of Memory Deduplication/Disabling Services and Firewall Rules.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.3
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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: Config
Status: 🔍

0-Day Time: 🔍

Config: Deactivation of Memory Deduplication/Disabling Services and Firewall Rules

Timelineinfo

08/18/2021 🔍
08/24/2022 +371 days 🔍
08/24/2022 +0 days 🔍
09/25/2022 +32 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: access.redhat.com
Status: Confirmed

CVE: CVE-2021-3714 (🔍)
GCVE (CVE): GCVE-0-2021-3714
GCVE (VulDB): GCVE-100-207026

Entryinfo

Created: 08/24/2022 07:47
Updated: 09/25/2022 07:56
Changes: 08/24/2022 07:47 (39), 08/24/2022 07:48 (1), 09/25/2022 07:56 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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