CVE-2022-42327 - x86: unintended memory sharing between guests On Intel systems that support the "virtualize APIC acc

CVE-2022-42327

Summary

x86: unintended memory sharing between guests On Intel systems that support the "virtualize APIC accesses" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.

References

https://xenbits.xenproject.org/xsa/advisory-412.txt
http://xenbits.xen.org/xsa/advisory-412.html
http://www.openwall.com/lists/oss-security/2022/11/01/3
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
https://security.gentoo.org/glsa/202402-07

Vulnerable Configurations

cpe:2.3:o:xen:xen:4.16:*:*:*:*:*:x86:*
cpe:2.3:o:xen:xen:4.16:*:*:*:*:*:x86:*
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*

CVSS

Base:	None
Impact:
Exploitability:

CWE

NVD-CWE-noinfo

CAPEC

Access

Vector	Complexity	Authentication

Impact

Confidentiality	Integrity	Availability

Last major update

04-02-2024 - 08:15

Published

01-11-2022 - 13:15

Last modified

04-02-2024 - 08:15