Linux Kernel up to 5.6 SELinux LSM Hook Netlink Message acceptance of extraneous untrusted data with trusted data

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 5.6. The impacted element is an unknown function of the component SELinux LSM Hook Handler. The manipulation as part of Netlink Message leads to acceptance of extraneous untrusted data with trusted data. This vulnerability is documented as CVE-2020-10751. The attack needs to be performed locally. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.6 (Operating System). It has been rated as critical. This issue affects some unknown functionality of the component SELinux LSM Hook Handler. The manipulation as part of a Netlink Message leads to a acceptance of extraneous untrusted data with trusted data vulnerability. Using CWE to declare the problem leads to CWE-349. The product, when processing trusted data, accepts any untrusted data that is also included with the trusted data, treating the untrusted data as if it were trusted. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in the Linux kernels SELinux LSM hook implementation before version 5.7, where it incorrectly assumed that an skb would only contain a single netlink message. The hook would incorrectly only validate the first netlink message in the skb and allow or deny the rest of the messages within the skb with the granted permission without further processing.

The weakness was released 05/26/2020 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2020-10751 since 03/20/2020. Attacking locally is a requirement. A simple authentication is required for exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 5.7 eliminates this vulnerability.

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Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Acceptance of extraneous untrusted data with trusted data
CWE: CWE-349
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 5.7

Timelineinfo

03/20/2020 🔍
05/26/2020 +67 days 🔍
05/27/2020 +1 days 🔍
10/19/2020 +145 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: bugzilla.redhat.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-10751 (🔍)
GCVE (CVE): GCVE-0-2020-10751
GCVE (VulDB): GCVE-100-155591

Entryinfo

Created: 05/27/2020 07:48
Updated: 10/19/2020 09:08
Changes: 05/27/2020 07:48 (42), 05/27/2020 07:53 (12), 10/19/2020 09:01 (1), 10/19/2020 09:08 (1)
Complete: 🔍
Cache ID: 216::103

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