CVE-2021-3543 - A flaw null pointer dereference in the Nitro Enclaves kernel driver was found in the way that Enclav

CVE-2021-3543

Summary

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://bugzilla.redhat.com/show_bug.cgi?id=1953022
https://lore.kernel.org/lkml/20210429165941.27020-2-andraprs@amazon.com/

Vulnerable Configurations

cpe:2.3:a:nitro_enclaves_project:nitro_enclaves:*:*:*:*:*:*:*:*
cpe:2.3:a:nitro_enclaves_project:nitro_enclaves:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

CVSS

Base:	7.2 (as of 03-06-2022 - 14:43)
Impact:
Exploitability:

CWE

CWE-416

CAPEC

Access

Vector	Complexity	Authentication
LOCAL	LOW	NONE

Impact

Confidentiality	Integrity	Availability
COMPLETE	COMPLETE	COMPLETE

cvss-vector via4

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

Last major update

03-06-2022 - 14:43

Published

01-06-2021 - 14:15

Last modified

03-06-2022 - 14:43