CVE-2021-3543

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

A flaw null pointer dereference in the Nitro Enclaves kernel driver was found in the way that Enclaves VMs forces closures on the enclave file descriptor. A local user of a host machine could use this flaw to crash the system or escalate their privileges on the system.

References

https://lore.kernel.org/lkml/[email protected]/

https://bugzilla.redhat.com/show_bug.cgi?id=1953022

Details

Source: MITRE

Published: 2021-06-01

Updated: 2021-06-11

Type: CWE-476

Risk Information

CVSS v2

Base Score: 7.2

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3

Base Score: 6.7

Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 0.8

Severity: MEDIUM

Tenable Plugins

View all (6 total)

IDNameProductFamilySeverity
153127Ubuntu 21.04 : Linux kernel (KVM) vulnerabilities (USN-4997-2)NessusUbuntu Local Security Checks
medium
150955Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-5001-1)NessusUbuntu Local Security Checks
medium
150953Ubuntu 21.04 : Linux kernel vulnerabilities (USN-4997-1)NessusUbuntu Local Security Checks
medium
150295RHEL 8 : kernel (RHSA-2021:2168)NessusRed Hat Local Security Checks
medium
150289RHEL 8 : kernel-rt (RHSA-2021:2169)NessusRed Hat Local Security Checks
medium
150145Oracle Linux 8 : kernel (ELSA-2021-2168)NessusOracle Linux Local Security Checks
medium