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CVE-2021-34866

Common vulnerabilities & exposures (CVE)

CVE databaseCVE database blogpostRelease & EoL database
 
Published at: - 25-01-2022 05:15
Last modified: - 29-03-2022 06:35
Total changes: - 4

Description

This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.14-rc3. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs, which can result in a type confusion condition. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-14689.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Low
Attack complexity
Local
Attack vector
High
Availability
High
Confidentiality
High
Integrity
Low
Privileges required
Unchanged
Scope
None
User interaction
7.8
Base score
1.8
5.9
Exploitability score
Impact score
 

Verification logic

OR
OR
vendor=linux AND product=linux_kernel AND version=5.14 AND update=rc3
AND
OR
vendor=netapp AND product=h410c_firmware AND version=-
OR
vendor=netapp AND product=h410c AND version=-
AND
OR
vendor=netapp AND product=h300s_firmware AND version=-
OR
vendor=netapp AND product=h300s AND version=-
AND
OR
vendor=netapp AND product=h500s_firmware AND version=-
OR
vendor=netapp AND product=h500s AND version=-
AND
OR
vendor=netapp AND product=h700s_firmware AND version=-
OR
vendor=netapp AND product=h700s AND version=-
AND
OR
vendor=netapp AND product=h300e_firmware AND version=-
OR
vendor=netapp AND product=h300e AND version=-
AND
OR
vendor=netapp AND product=h500e_firmware AND version=-
OR
vendor=netapp AND product=h500e AND version=-
AND
OR
vendor=netapp AND product=h700e_firmware AND version=-
OR
vendor=netapp AND product=h700e AND version=-
AND
OR
vendor=netapp AND product=h410s_firmware AND version=-
OR
vendor=netapp AND product=h410s AND version=-
 

Reference

 


Keywords

NVD

 

CVE-2021-34866

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures

 

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